The Side Effects of Vaccines - How High is the Risk?

  • Published: 12 May 2019
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    Vaccines are one of our best tools to prevent dangerous diseases, but they come with side effects. So would it be safer not to vaccinate?

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Comments • 64 921

  • Kurzgesagt – In a Nutshell

    Dive into sources and further reading here:

    Vaccines and their side effects are a hard topic to cover – we know we keep saying this, but this case especially, there were a lot of things to consider. You can’t blame people for being worried, so we wanted to take their concerns seriously.

    Because it is impossible to cover everything there is to know about vaccines in a ten minute video our sources are extra extensive and explain a lot of aspects in more detail, with an extra focus on further reading.

    So if you want to dive in deeper or have more arguments at hand for your next heated discussion, here you go.

    • Jarley
      Jarley  1 weeks back

      Kurzgesagt – In a Nutshell you forgot one thing that vaccines cause:

      adult hood
      I don’t want that happening to my children

    • GodmanBG
      GodmanBG  1 weeks back

      It would be nice if you had touched upon, or at least mentioned that we vaccinate against a multitude of other diseases besides measles.

    • Austin Yang
      Austin Yang  1 weeks back

      Kurzgesagt – In a Nutshell The only person to actually have sources in the entire comment section.

    • BrettC11B
      BrettC11B  1 weeks back

      +Rox Paid people or bots, the lot of these post aren't even real people. 0 subs.

  • Cpapa18
    Cpapa18  6 minutes back

    I once had a girlfriend who only ate lettuce for 6 months and tried to convince me, a doctor, that I should do the same.
    When I told her she would get massively sick she laughed in my face.
    After we broke up she dissapeared for 6 months and finally called me up one day to tell me she collapsed and almost died one day, having to spend 6 months in the hospital to recover, where all the doctors there told her the exact same thing I did, that she's not a rabbit and she can't survive on lettuce and carrots alone.
    She then went on to blame me for not taking better care of her when I knew what would happen.

    This is the exact same thing that is happening with anti-vaccine parents. They are told their children will get massively sick and die, and when they do, they blame the doctors.
    I have no words anymore for what is happening. It's truly sad.
    Don't be idiots, and don't abuse your kids. Vaccinate.
    For the love of God stop listening to hippie blog posts and listen to DOCTORS who deal in facts, SCIENCE, and experience. VACCINATE.

    • Kayla A. Stephen
      Kayla A. Stephen  12 minutes back

      I mean, when we didn't have vaccines available we almost wiped out the entirety of the native population with small pox. It was a military tactic for gods sake! Small pox blankets! Funnily enough that was also the first disease to have a vaccine be invented. They used cow pox to defeat small pox which was a less deadly and contagious infection that killed off the disease. Its only side effect was lesions.

      • Cat
        Cat  15 minutes back

        My neighbor legit vaccinated their pets but not their kids.

        • panggop jio
          panggop jio  25 minutes back

          Saying vaccines cause autism is like saying video games cause violence

          • Lepel
            Lepel  34 minutes back

            Hey guys. This is not funny, delete this now, or my lawyer will be contacted.

            • Evèłýň ERROR
              Evèłýň ERROR  38 minutes back

              No one:

              20.000 KIDS WILL DIE FROM MEASLES!

              Edit:300.000 KIDS WILL DIE RITGHT NOW!

              • pokegamer 300
                pokegamer 300  45 minutes back

                Fuck all AntiVaxxers They are Biological Terrorists who endanger everyone with Viruses and Diseases they are a Threat To Society who endanger our Children

                • lily lam
                  lily lam  1 hours back

                  There was an outbreak of measles where I live a while back, my friends and I really dipped on Anti-vaxxers.

                  • Elizabeth Petrick
                    Elizabeth Petrick  1 hours back

                    Well, I must have a lot of memory cells or sometin

                    Edit: I have cuts and scars of those cuts, like one that will *_ALWAYS_* be with me

                    • Andre Johnson
                      Andre Johnson  2 hours back

                      I’m a proud antivaxxer with 3 healthy, beautiful children.

                      • Mrs pancake
                        Mrs pancake  2 hours back

                        When the anti vax kid bullies you and you see a rusty nail on the ground...

                        • that's not me fellas
                          that's not me fellas  2 hours back

                          great video!

                          • 8000 cats
                            8000 cats  2 hours back

                            Sad thing is, I’ve me anti-vaxxers and they literally don’t care about the truth. I’ve explained how there’s no link to autism “that’s ur opinion”, I’ve explained that the likelihood of it causing harm is extremely low “but they have mercury”, I’ve even explained that by refusing to vaccinate they are literally killing children, the elderly, and those who are too sick to get vaccines. Their reaction? They always ignore those words. Literally no reaction. They just continue rambling about essential oils, not acknowledging that every time they go in public, there’s a chance they’re directly responsible for killing someone, ruining the lives of them and their loved ones. They’re monsters.

                            • that's not me fellas
                              that's not me fellas  2 hours back

                              so many memes lol

                              • Shibha Alam
                                Shibha Alam  2 hours back

                                The IQ of anti-vaxx mums' is lower than the life expectancy of their children

                                • Morgster
                                  Morgster  2 hours back

                                  These animations continue to impress me🤦‍♂️

                                  • Joseph Pentony
                                    Joseph Pentony  3 hours back

                                    VACCINATE your f***ing kids.

                                    Or else natural selection will occur.

                                    • fraudiepie
                                      fraudiepie  3 hours back

                                      Karen : I’ll never vaxx

                                      A year later

                                      Karen: RIP Timmy 2014-19

                                      Literally everyone: just vaxx

                                      Karen: no it’s just a coincidence

                                      Literally everyone: *face palms*

                                      • AireDrew _
                                        AireDrew _  4 hours back

                                        My sister and mom recently went anti-vax, thank Christ this happened later and not earlier in my life so I already have my vaccines and a strong immune system 👍

                                        • Some Random Guy
                                          Some Random Guy  50 minutes back

                                          +Vox3l-Gl1tch yeaaaaa i agree

                                        • Vox3l-Gl1tch
                                          Vox3l-Gl1tch  3 hours back

                                          I recommend not communicating with them anymore.

                                      • Zengn Draws
                                        Zengn Draws  4 hours back

                                        Well, you can’t win an argument with an idiot, so good luck beating the anti-vaxxers...

                                        • Some Random Guy
                                          Some Random Guy  50 minutes back

                                          Yeah. Dont argue with an Idiot. They will drag you down to their level and beat you with experience.

                                      • c0ast
                                        c0ast  4 hours back

                                        Vaccines are mirco-transaction

                                        • TheMarioManiac
                                          TheMarioManiac  4 hours back

                                          Saying vaccines cause autism is like saying video games cause violence

                                          • AlexBlackFire
                                            AlexBlackFire  4 hours back

                                            Not very educational because all he did was talk about ONE disease. Measles. You are aware that kids are usually getting 100 vaccinations and they get more and more as they get older for monthly checkups? Let's just go ahead and multiply that number by ONE vaccination he talked about. Oh look at that, the numbers went from 1 million to 100 million... This video is honestly a joke.

                                            Excited to see some mad little kids come at me with little facts they found off the internet. Come at me.

                                            • Some Random Guy
                                              Some Random Guy  48 minutes back

                                              "Facts they found off the internet" where did you get your facts? Sone dude in an alley?

                                            • lyrehc the bran man
                                              lyrehc the bran man  2 hours back

                                              +Vox3l-Gl1tch _involuntary manslaughter time_

                                            • Vox3l-Gl1tch
                                              Vox3l-Gl1tch  2 hours back

                                              +Artful Nihilism Nah, his mom took away his YouTube account because she saw him watching this video.

                                            • Artful Nihilism
                                              Artful Nihilism  3 hours back

                                              did your mommy set you up for this?

                                            • lyrehc the bran man
                                              lyrehc the bran man  3 hours back

                                              -calls out people for getting facts off the internet but probably got these "facts" off the internet too

                                          • Lady Emery Draven
                                            Lady Emery Draven  5 hours back

                                            I am not an anti-vaccer. However, there are some unnecessary vaccines that people are being told ( and and some places forced ) to give to their children. There are also some negatives that are not considered in this video, including increased population over natural amounts. As well as vaccines, we should also be promoting the idea of less children, as part of the reason for having more than two children per couple is because of child death rates. Also these things we are vaccinating against, if they do not actually get killed off, but instead effectively killed off ( as the case with measles) they can learn to defeat the antibodies. Creating the necessity for a new vaccine for the same old problem. That being said it should not be something someone has no choice but to do under penalty of law. To take someone's choice to vaccinate or not is to take away someone's choice. And as everyone knows choice is a freedom. Please note my children's vaccines are up-to-date.

                                            • Some Random Guy
                                              Some Random Guy  47 minutes back

                                              True freedom is doing good for others.

                                            • Vox3l-Gl1tch
                                              Vox3l-Gl1tch  3 hours back

                                              Fuck your freedom. When it has to do with the actual life of a person, you can't choose if you want to protect them from a disease or not.

                                          • Ian Erickson
                                            Ian Erickson  5 hours back

                                            Vaccines cause autism

                                            Because antivaxx children die before they can get autism

                                            • Some Random Guy
                                              Some Random Guy  47 minutes back

                                              They had us in the First half, not gonna lie

                                            • Mystic Arceus
                                              Mystic Arceus  2 hours back

                                              They die before they start showing signs because, of course, they were born with it.

                                              Vaccinate your fucking children, Karen.

                                          • FDN
                                            FDN  5 hours back

                                            That MCU reference.

                                            • Desu_troyer
                                              Desu_troyer  5 hours back

                                              hurr paid by BigPharma durr

                                              • Richard Benz
                                                Richard Benz  5 hours back

                                                Thanks to all the anti-vaxxer IDIOTS and conspiracy theory morons, measles epidemics are now a reality again. Way to go, you ignorant fools.

                                                • TRITZ005
                                                  TRITZ005  5 hours back

                                                  Actually Vaccines cause very harmful side affects

                                                  • Vox3l-Gl1tch
                                                    Vox3l-Gl1tch  3 hours back

                                                    +TRITZ005 If you're going to make a joke, at least try to make one.

                                                  • TRITZ005
                                                    TRITZ005  5 hours back

                                                    I don’t actually think that just to lazy to put “staying alive” at the end

                                                  • Tautologist
                                                    Tautologist  5 hours back

                                                    Very harmful side effects are extremely rare. Vaccines frequently cause insignificant side effects that can be attributed to your immune system getting trained by the weakened disease, but those side effects are exponentially less serious than the real disease. Measles, on the other hand, causes way more harmful side effects than any vaccine.

                                                • ANT EXENOMORPH YOUTUBE GAMES UNTURNED COMMENT GUY

                                                  Aaaaand then you remember child murderers will not even watch first 30 seconds.

                                                  • DragonNess
                                                    DragonNess  6 hours back

                                                    im not an anti vax person i even highly encourage people to vax but i had this one fax but im afraid of needles i cant stand some metal thing or whatever the needle is made of entering my body and injecting things into my body it makes makes me feel weird and usualy i do take the vaccines but then the vaccine against sorry i cant rember wich but i haven't had a needle injected into my body for a long time and i just freaked out of being scared and without thinking the minute before getting the vaccine i freaked out and didn't took it now i already feel guilty for risking my own saftey just because i couldn't calm my self but then 9:09 and now i feel even more quilty im gonna ask my parrents if im still the right age to get it but i really dont want to but i really should

                                                    • Nirwana
                                                      Nirwana  6 hours back

                                                      Imagine disliking this video and be a total piece of shit.

                                                      • Brandon Diaz
                                                        Brandon Diaz  6 hours back

                                                        This is fucking why I don’t have any children. Just don’t fucking have them in general. Problem, there isn’t one.

                                                        • Reed Boucher
                                                          Reed Boucher  6 hours back

                                                          Aren't you the guy who did the videos for the Royal Tyrell Museum?

                                                          • Matthew Molson
                                                            Matthew Molson  7 hours back

                                                            Wonderful video, it was a pleasant experience and interesting to learn from. It wasn’t biased and felt comforting in correcting wrong behaviour that most anti-vaxer’s would experience. I.e, little brain syndrome

                                                            • Virgin1008
                                                              Virgin1008  7 hours back

                                                              Memory cells are like battle-hardend war veterans and Sergeants.

                                                              • Brain Dead
                                                                Brain Dead  7 hours back

                                                                Anti vaccer logic;

                                                                You’re in a swimming pool

                                                                The smart people put life jackets on their kid so they can learn to swim and stay safe

                                                                The anti vaccers just let their kid go in the pool so they can learn to swim.

                                                                They think that life jackets can suffocate kids or they can be allergic to the material.

                                                                There’s a very small chance they might be but theres never been a case of a kid being suffocated by one

                                                                Luckily there’s a lot of kids with life jackets so they hold up the unvaccinated kids

                                                                They could literally be unable to drown yet they decide not to because of fake news

                                                                If they go to a poorer area where they can’t access a life jacket the kid from the rich area will splash too much since they can swim without the support of others

                                                                The waves were calm until the kid came

                                                                This will cause them to drown since they can’t swim

                                                                After hundreds of years this one kid with stupid parents made the waves violent again and they will cause others to splash around, creating a cycle

                                                                Hope that makes sense

                                                                • John Blatzheim
                                                                  John Blatzheim  8 hours back

                                                                  Great video! However, I think it would benefit from something that a few other Kurzgesagt's videos might also be enriched by, particularly ones like this and the most recent EU video which, I presume, are meant to serve a sort of public service role by educating folks on a topic of current debate--more engagement with the humanities and social sciences. (I know, you all already put in SO much work! And areas outside of the "hard" sciences might seem beyond the scope of what you're doing, but I do think there are cases where it is really important for a full understanding). Here specifically it is important to consider the difference between a negative effect resulting from innaction and one from action. People, at least in westernized cultures, seem feel very differently about these. There are three fields of study that might help elucidate the issue--philosophy, psychology and cultural anthropology.

                                                                  The first is useful for considering how ethicists--again, primarily in the west--have actually dealt with this quandary. These are people who have spent a lot of time developing normative responses to the issues--that is, what an ethical approach *ought* to be when weighing the costs of inaction versus that of action. Psychology, on the other hand, can shed light on how and why people have the affective responses that they do. It might also offer insight into how we might overcome any cognitive and affective bias against taking risky action, even when the risk of inaction is vastly more serious. Lastly cultural anthropology--and as an anthropologist I might be a bit biased here!--can serve as a good reminder that neither normative ethical claims or psychological processes are as universal as we might like to think. It helps us understand the cultural values systems that inform both the kinds of ethical systems that philosophers develop and how our psychological reactions are shaped by out sociocultural contexts.

                                                                  Admittedly, each can also raise some thorny issues for the prospects of educating anyone already invested in anti-vaxxer conspiracies. Philosophy, at least in its more positivist and universalistic modes, can smuggle in the very normative value systems that may need to be challenged in order to effectively confront these conspiracies. On the flip side there are ethicists--and I would include myself in this group--grounded in the dreaded feminist and postmodern traditions who outright any universalistic truth claims, instead emphasizing particularity and contingency. This has its own difficulties--namely, how do you make normative claims about what we ought to do in the absence of universally applicable value systems? Psychology can undercut the very purpose of educating people when it suggests that they aren't inherently rational and thus are unlikely to be persuaded by logical reasoning. And anthropology is often reluctant to make normative claims, preferring instead a relativist approach that tries to understand the cultural underpinnings of a society's ethical thought rather than passing judgement.

                                                                  All that said, I think they offer two strengths. For one, they enrich our understanding of the issue. I enjoy these videos regardless of whether they might convince anyone already resistant to their thesis. Their value can reside simply in enriching the viewer, even if they likely already agree with premise and only want a deeper understanding. Second, they can point to possible systemic responses. While we might not be able to overcome the cognitive and affective biases of those already committed to the anti-vaxxer cause, we can try to deal with the systemic factors that lead to such conspiracy theories in the first place. This is often more difficult than giving all the facts and scientific research to your goofy uncle, but I think it's worth it, especially because these systemic issues often have a number of other negative effects.

                                                                  Anyways, sorry of the long winded comment! I just can't help but rep by own favorite mode of inquiry :-p

                                                                  • brunocerny
                                                                    brunocerny  8 hours back

                                                                    i am an antivaxer and not because i think vaccines dont work. i know they do. i understand the process and i believe its well thought off and works to protect the body..

                                                                    what i dont believe is the manufacturers. i think vaccines nowadays have a different formula/quality and ingredients as 20-30 years ago. i believe they put shittier chemicals . things that may cause the autism. or make you sick from other things in life, so you have to buy other drugs/medicine that they make. after all, how do you know? there can be only few molecules or micro-grams of something which can do a lot of harm to your body(especially to a small baby body). i dont trust them , sorry. they are very rich companies and they can pay any lab to say the vaccines are pure/not harmful. they are huge pharma companies that are richer then many countries. im sorry, but today same way as food is not same quality as before - full of chemicals, preservatives, not grown on sun- and usually controlled/manufactured by the same companies (mosanto, bayer , PG etc..). this companies work for profit and they dont give a shit about your health, believe me that.

                                                                    and the skeptic people around here making jokes, how old are you? do you remember food from 20 years ago? i bet you dont...if you tasted real nice sun grown food , meat from cows and chicken from outside, on a nice farm eating grass... not what you eat today... then we wonder why the whole society is sick both in body and mind... "if you tolerate this, then your children will be next " - look it up

                                                                    • Tautologist
                                                                      Tautologist  5 hours back

                                                                      Vaccine products today are MUCH safer and effective than they were 20-30 years ago. I'm surprised you would think the opposite of this, since back then they used thimerosol as a preservative, and while it hasn't been shown that it was harmful at all, I know what anti-vaxxers think of that stuff. Also, vaccines don't cause autism. There has been absolutely zero evidence that's true.

                                                                      Speaking of food, you get FAR more "shittier chemicals" from your daily intake of food than from vaccines, and that even includes "real nice sun grown food". If you're concerned with the amount of aluminum, mercury, etc in vaccines, why are you not concerned with the massively higher amounts in everything we eat and the amount we absorb from the environment?

                                                                      I'm not going to make any jokes, and I don't know what age has to do anything, but I'm certainly old enough to recognize that even the healthiest of diets is not sufficient to protect yourself from the nightmare diseases that vaccines prevent.

                                                                    • likira111
                                                                      likira111  7 hours back

                                                                      Then that would be an America centric conspiracy. Most places you won't have to pay to get vaccinated.

                                                                  • John Thomas
                                                                    John Thomas  8 hours back

                                                                    Ok genius glad to see you definitely lack a lot of knowledge

                                                                    • Some Random Guy
                                                                      Some Random Guy  44 minutes back

                                                                      He ACTUALLY put factual evidence and credible sources AND a logical argument. But you guys are going to say some crap you found on an idiots's facebook post, so I wont bother.

                                                                    • Dunno What to put here
                                                                      Dunno What to put here  3 hours back

                                                                      Sorry, facts don’t care about your feelings. Where is the proof that he lacks knowledge or is on the wrong side of the argument?
                                                                      P.S work on your grammar.

                                                                    • likira111
                                                                      likira111  7 hours back

                                                                      Found the emotion user.

                                                                  • John Thomas
                                                                    John Thomas  8 hours back

                                                                    My point is your stupid or your being payed to be obnoxious

                                                                    • Some Random Guy
                                                                      Some Random Guy  42 minutes back

                                                                      John Thomas no u. What is your evidence? We have DECADES of evidence from MULTIPLE reliavle sources. And if you say things like "ThE wHo Is LyInG" then, who can you trust? Essential oils? You wanna take reliable information and research or some crap you found at a beauty stor?

                                                                    • Vox3l-Gl1tch
                                                                      Vox3l-Gl1tch  3 hours back

                                                                      +Redditor Reddit *Curb your Enthusiasm theme plays*

                                                                    • Redditor Reddit
                                                                      Redditor Reddit  6 hours back


                                                                  • Arthur Vas
                                                                    Arthur Vas  8 hours back

                                                                    Thank you to try keep people informed in a very rational way without falling in the trap of overreaction and personal feelings! I do really love every single one of your videos !

                                                                    • Tuoff
                                                                      Tuoff  8 hours back

                                                                      I think the anti-vaxx bs stems from a total loss of faith in the institutions of the status quo.
                                                                      It's a side effect of mistreatment and neglect of the common man.

                                                                      • Tuoff
                                                                        Tuoff  48 minutes back

                                                                        +Lucien Richardson That too

                                                                      • Lucien Richardson
                                                                        Lucien Richardson  3 hours back

                                                                        Or just facebook moms believing that they're the smartest people in the world?

                                                                    • MrPaul84279
                                                                      MrPaul84279  8 hours back

                                                                      Thank you so much for this video. It easily explains the basic concept and easily the risks of non vacation

                                                                      • ur mom gay
                                                                        ur mom gay  8 hours back

                                                                        I'm not putting antivirus software on my computer because it could be a scam

                                                                      • Ocarinaot 4
                                                                        Ocarinaot 4  8 hours back

                                                                        4.4 million views in a week. Impressive. Good on you for using the power of having an audience wisely