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 • 76 268

  • 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.

    • toxicboi i
      toxicboi i  3 days back

      The people who dislike the video is probably Karen

    • grab america by huevos
      grab america by huevos  3 days back

      hey i was in the military got every shot except the hpv gardisal no they are not good for your body, why do they give a live attenuated virus in the flumist, why is everyone still sick a couple of days after the flu shot, why do i diagnosed with strep throat in the military if we are fit in the military, i had to get a penicillian shot in the butt, where the studies on the military with reactions to those shots? where results from the burn pits and poop pits from us veterans, why did we wear perithrin soaked uniform deployed "to keep bugs off" why did we stay in mosquito bombed buildings,

    • Nick Korkodylas
      Nick Korkodylas  4 days back

      I am constantly being called an "anti-vaxxer" and a "science denialist" just for pointing out that it's a bad idea to allow governments make sticking needles in your children mandatory. They also called me a "conspiracy theorist" for pointing out that some vaccines used mercury compounds as preservatives.

    • Jordan Sutche
      Jordan Sutche  7 days back

      The fact you brought up Wakefield's "research" just proved you didn't actually look into it at all. That's a fact.

    • Haziq Aiman
      Haziq Aiman  7 days back

      Ok gus

  • Christian AAA Ebuna
    Christian AAA Ebuna  28 minutes back

    Memory cells are just cells with PTSD

    • Foxwell Kennedy
      Foxwell Kennedy  55 minutes back

      You are supporting the anti vaccination movement.... "It's treason then."

      • I’m very Hungry
        I’m very Hungry  2 hours back

        Karen : *doesnt vaccinate her child*
        Child : *dies of measles*
        Karen: *Impossible*

        • Tovarishch Vaschily
          Tovarishch Vaschily  4 hours back

          I have never been vaccinated. And I never get sick, I do not have any mental health issues or brain diseases, my sister was the same up until she was forced to have one, not even 10 days later she contracted a very bad case of the measles, and then 4 years later was diagnosed with OCD, even though she had never shown signs of it before, she was 27 when this happened. Everyone keeps telling me "you just have a good immune system", so is it a coincidence that the majority of people who don't get vaccinated just happen to have a "good immune system", ill let you decide. Let my sisters story at least be somewhat of a weight on your scale, thank you

          • The three cool kids: Finnegan, Leo, Waverly

            I’m betting over 90 percent of the 8100 dislikes are suicidal people/anti-vaxxers

            • Enzo Luiz
              Enzo Luiz  5 hours back

              Please dont be a anti-vaxx please dont be an anti-vaxx please dont be an anti-vaxx

              • Ozzie40
                Ozzie40  8 hours back

                I'm proud to say I've never been vaccined now

                • Error Info
                  Error Info  8 hours back

                  Anti-vaxx moms be like: *Cheering* THEY KNOW

                  • Chupa Chups
                    Chupa Chups  8 hours back

                    SHUT UP U ANTI VAX MAN

                    • Autistic oak
                      Autistic oak  10 hours back

                      conclusion fucking use vaccines

                      • carlos delgado
                        carlos delgado  10 hours back

                        Anti vaxxers: Hey don't use a vaccine in my child!

                        Doctor: Miss, No spawn killing

                        • Hien Nguyen
                          Hien Nguyen  14 hours back

                          Human are really stupid sometimes, flat earth, fake moon landing and now antivax

                          • Sara Will Gasha
                            Sara Will Gasha  16 hours back

                            Are they any anti vaccines who were convinced that vaccination is necessary? Interested in hearing from you.

                            • RapidHmsta 6241
                              RapidHmsta 6241  16 hours back

                              Bacteriophage: Allow me to introduce my self.

                              • dontsubscribe
                                dontsubscribe  16 hours back


                                Love being alive

                              • Abdullah Baroon
                                Abdullah Baroon  21 hours back

                                * Me talking to my freind about bieng teenagers and adult hood *
                                His anti vax mom: hahahahah YOU FOOL

                                • KerbalTube HD
                                  KerbalTube HD  22 hours back

                                  All vaccinated kids will die...

                                  It just takes 97 years longer than antivaxx kids

                                • Big Nutty
                                  Big Nutty  1 days back

                                  Even if vaccines somehow cause autism, in the perspective of a caring parent, I much prefer my child to have autism than dying of a preventable disease.

                                  • ChaCha Channel
                                    ChaCha Channel  1 days back

                                    Anti Vaxxers, have you considered? there is 1 person in the left and 1 million people in the right, only one of the two groups must die, which would you choose?

                                    Its the same with vaccines, yes, there is a chance that it would mutate and harm a child but if you compare it to the amount of lives that it could save, you can only think of how its better to take that risk rather than endangering the lives of the masses.

                                    TLDR; Vaccines may be not perfect but we accept it and its use precisely because its the closest we could get to complete safety for our lives and the lives of others.

                                    • Sissy Carolina
                                      Sissy Carolina  44 minutes back

                                      ​@Tix is gey Vaccination is Russian Roulette with your body. You may be lucky now but that doesn't mean you won't come down with cancer or some other disease as a result of vaccination in the future. 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
                                      [Vaccine Name Here] has not been evaluated for carcinogenic or mutagenic potential or impairment of fertility. ----All vaccine inserts say this in one form or another. Hope your luck continues to keep you healthy.

                                    • Tix is gey
                                      Tix is gey  14 hours back

                                      @Vary Olla the pathogen in vaccines are not supermutant, i am fully up to date in my vaccines and for 13 years i have not experience: Polio, Measeles, And Rubella. Quit your bullshit.

                                    • Vary Olla
                                      Vary Olla  17 hours back

                                      Actually there is no mutation involved = save for perhaps by the unvaccinated who subsequently catch what we vaccinate against.  By allowing those active infections which vaccination can prevent = they are potentially allowing the rise of new mutations to occur.

                                      Meanwhile if you look at serious adverse reactions to vaccines and compare them to what we see among people who catch what the vaccine prevents = we see similar symptomology.  That tells you those reactions are being driven - not by the vaccine ingredients per se - but rather from the pathogen in the vaccine which causes similar reaction in both vaccination and the disease.

                                      So now understanding that the pathogen is the culprit involved in both = it becomes as you alluded to a matter of which one precipitates those severe reactions less.  History conclusively demonstrates that people suffer serious adverse reactions to vaccination at an incidence level exponentially less than what we used to see from the diseases in the time before a vaccine was employed.  That makes vaccination a better option as you are at risk regardless since infectious pathogens exist in nature = and thus in human populations. 

                                      Accordingly understanding that we used to see adverse reactions to the diseases in the time before vaccines were employed = we therefore must consider the reality that those few people who could not tolerate being vaccinated using a weakened form of the pathogen would in all likelihood react similarly or worse upon exposure to the full-strength version of the same.  That means people unable to tolerate vaccination would be among those who ended up hospitalized anyways upon catching say measles in the time before the MMR.  The MMR etc. however as noted gives you better odds.  Have a nice day.

                                  • PancakeBoie
                                    PancakeBoie  1 days back

                                    100% of all people who have breathed oxygen in their lives have died

                                  • Robert Eischen
                                    Robert Eischen  1 days back

                                    If you use your medical degree from the university of Google to tell me vaccines are bad, I'm not gonna listen. I prefer the opinions of people who study medicine their entire life compared to you.

                                  • LewY_ HuN
                                    LewY_ HuN  1 days back

                                    -Karen is typing

                                    • David T. Lego Animation

                                      6:57 - inflammation of the genetalia...nor literally right?

                                      • angelos efstratiou
                                        angelos efstratiou  1 days back

                                        Vaccines to anti-vaxxers:
                                        You are being rescued, please do not resist

                                        • skoorb nimajnib
                                          skoorb nimajnib  1 days back

                                          Are vaccines safe now? Now that they don't contain a lot of mercury and aluminium. Who knows? One maybe. But how many do they give babies in one batch? Certainly many scientists think not and many juries and judges think not. People are calling me crazy in intimidating tones. But listen, no one is paying me to write this so it comes from my heart. You vaccinate yourself and your baby.
                                          Don't be too quick to judge what is safe or not for others when it is their risk.
                                          We can't say that food has toxic chemicals so let's inject some too. Well - you can...but can you impose it on parents of a newly born baby?
                                          The idea of a vaccine is rational. And maybe it can work in some cases but so was communism justified in some senses. But you are not going to force me into saying the gulag concentration camps were good.
                                          I don't want to be abnormal...or called crazy, but listen - What we call call normality is based on a lot of appearance and the authority of paid professionals who were often just good swats and also the "common sense" of the masses who just want to eat sleep and be happy and get a quick fix to cure their ills etc. But that reality including scientific orthodoxy gets broken down. New science breaks through that with imagination and faith in a new theory, and scepticism about an old theory. Information and organization is important too but above all a passion for truth. Truth is neither absolute....but not absolutely relative either.
                                          Another caution: scientists are often just technicians. Utility is important but science must be not only concerned with plugging gaps and making money. Therefore, be suspicious of "common sense", authority, and even utility. Most of what medical science thought has now been contradicted and new science is emerging all the time to say: "hey! Wait! Prozac is not so good after all!" Etc. And indeed, maybe saffron works better! ". The utility is greater from the point of view of a patient can have more natural things and not chemicals or monkey viruses which weaken his immune system and end up in his brain giving him Alzheimer's. Of course, garlic is too cheap and wouldn't find the pharmaceutical industry but, well....also, some people worry about their breath smelling. In that case I recommend chewing gum without aspartame. In the case of seaweed, I wouldn't recommend the Pacific and in the case of war, ask your trusted new world order captain if they put radioactive material in the bullets! You don't want to go home a veteran with gulf war syndrome, do you?

                                          • Null Void
                                            Null Void  4 hours back

                                            "science breaks through that with imagination and faith...."
                                            "therefore be suspicious of common sense, authority and even utility"

                                            u say faith.. yet u want us to be suspicious of common sense, authority and even utility. I dont think that being suspicious to those things is what I call as being faithful.

                                          • The Shinto Railfan
                                            The Shinto Railfan  1 days back

                                            Yes, vaccines are safe. The Mercury and Aluminum in them is harmless. I'm pretty sure it's in there to preserve the MMR, which is why there's more in your food than in vaccines.

                                        • Fawcett Master
                                          Fawcett Master  2 days back

                                          Y’all see
                                          Measles is powerful
                                          It got to Greenland

                                        • Καςεγ Χαος
                                          Καςεγ Χαος  2 days back

                                          Succinctly put! Consider me a true subscriber to this balanced and informative channel.

                                          • Burn Angel
                                            Burn Angel  2 days back

                                            Gotta love how Kurzgesagt wrote the title in a way antivaxxers will be drawn to watch it, just to show them how wrong they are.

                                          • ItzGrexisPvP
                                            ItzGrexisPvP  2 days back

                                            2:06 someone can make a video game about this, don't you think?

                                          • BananaDayz
                                            BananaDayz  2 days back

                                            People shouldn’t judge anti-vaxers since they may have their reasons
                                            For instance my brother got serious allergic reactions and poisoning from vaccines (Confirmed many many times) and has struggled now for over 15 years with his liver suffering from the poisoning (the rest if the side effects are more complicated). And we had to go to hundreds of doctors and he has recieved hundreds of treatments, for this reason we didn’t vax for a few years but are considering going back to vaccinating, he is doing well and is almost cured.
                                            Please don’t judge or hate with comments and replies
                                            This was just me explaining that some anti-vaxers have reasons
                                            And we shouldn’t make fun or judge people no-matter what they believe!

                                            • BananaDayz
                                              BananaDayz  11 hours back

                                              The Shinto Railfan And I just want to thank you ♥️, you are the first person i could houve had a ‘conversation’ with without being full on insulted or called dumb and inhuman. Thank you!♥️

                                            • BananaDayz
                                              BananaDayz  16 hours back

                                              The Shinto Railfan I fully agree and understand (All that i was trying to say is that people should stop calling all anti-vaxxers dumb or ‘like flat earthers’ without hearing their reasons... and we shouldn’t even call anyone dumb 🤣) and I know many people just don’t vaccinate because they are too lazy to get a vaccine or read one story from a victim and i agree that is wrong.♥️❤️♥️

                                            • The Shinto Railfan
                                              The Shinto Railfan  17 hours back

                                              No, @BananaDayz, they have no reasons. They don't want to look at the whole scientific picture. They hardly ever use something more than there gut feeling when deciding something that could be life or death to someone who can't be vaccinated, like your brother. And, for the most part, if you have an allergic reaction to MMR or any other vaccine, you should get treatment and be fine.

                                            • BananaDayz
                                              BananaDayz  22 hours back

                                              The Shinto Railfan I fully understand what you are saying and we are not gonna vax him for this reason and my situation was most likely very rare but all i was trying to say is that with some people who are anti-vax have their reasons like the video said there can be side effects even tho most can be cured, so some are not cured or some people are just scared of vaxing cause of what they heard.. and can we blame them? They just want the best for their children, and sometimes things like this confuses you and places you in a position where you don’t know what to do and you decide on a side (vax or anti-vax) and really can we blame them they just want they best for their children... but I totally agree that anti-vax protests are not necessary, but i believe people should be able to share their story (bad or good) and i thank you for not full on judging me like most others have ♥️♥️♥️

                                            • The Shinto Railfan
                                              The Shinto Railfan  1 days back

                                              Hold up.
                                              1: If your brother got a severe allergic reaction, only herd immunity can save him from injury or death. And the only way to get that is by vaccinating.
                                              2: "and has struggled now for over 15 years with his liver suffering from the poisoning"
                                              That's very, _very_ , rare. He's probably 1 of 100 in the world.
                                              3: "but are considering going back to vaccinating"
                                              That's a _horrific_ idea. Your entire situation would just repeat itself. If he's allergic, the only thing that can protect him is heard immunity, *not* vaccinating him. So it's your job to encourage people to vaccinate to protect him.
                                              4: "This was just me explaining that some anti-vaxers have reasons"
                                              All you did was talk about you 1 in 1,000,000,000 case. You did nothing else.

                                          • MochaPastelz
                                            MochaPastelz  2 days back

                                            How to stop anti-vaxxers:

                                            Call them pro-disease
                                            They hate being made fun of so if they vaccinate their kids they won't be called pro-disease anymore and finally understand

                                            There's a 50/50 chance it'll work

                                            • KritzИ
                                              KritzИ  2 days back

                                              Anti Vaxxers= F2P Player
                                              People that use Vaccines= P2P Player

                                              • M o d z z
                                                M o d z z  2 days back

                                                E y e s c a u s e t e m p o r a r y b l i n d n e s s

                                                • Kaytlin Justis
                                                  Kaytlin Justis  2 days back

                                                  When I first read about vaccines as a child, it was about rabies, and the vaccine is like a WARNING poster to your body. When you get a specific vaccine, it gives your body a 'heads-up' to a specific disease to prepare against. Something similar to this video. It was honestly shocking to see how far measles has rebounded because people have stopped themselves and their kids from vaccinations in this year alone! People who rely on other's vaccinations end up getting their kids sick because they are too young for the Warning posters! In a perfect world, someone would create a specific gene that makes us adapt to illnesses spontaneously, and prevent us from getting sick ever again, because our memory cells can mutate like a virus and drug-resistant bacteria.

                                                  • ManProg 08
                                                    ManProg 08  2 days back

                                                    Non-anti vax: yeah sure we need vaccine

                                                    Anti vax: (don't see this video)

                                                    • Sara Martinez
                                                      Sara Martinez  2 days back

                                                      The antivax problem will solve Its self so yea

                                                      • Anwukia
                                                        Anwukia  2 days back

                                                        me: vaccines are protective agents
                                                        anti-vaxxers: you have autistic

                                                        • Mushroom Cow
                                                          Mushroom Cow  2 days back

                                                          alright bois i have autism and my mum says that one of her friends' son has low functioning autism because he got the swine flu shot when he was 6 weeks old and my mums lowkey retarded i wanna move in with my dad becuase he has a brain (my mum knows vaccines dont cause autism but she thinks it makes vaccines more severe i cant)

                                                          • maxim
                                                            maxim  2 days back

                                                            vaccines have one side affect

                                                            IT'S CALLED ALIVE

                                                            • Malamex
                                                              Malamex  2 days back

                                                              F O R T N I T E C U A S E S A U T I S I M.

                                                            • Jason Khimera
                                                              Jason Khimera  2 days back

                                                              I know it's awful... But... Let the Antivax not vax... Then they and their kids are more likely to die and evolution takes its course...

                                                              • Karl Håkansson
                                                                Karl Håkansson  2 days back

                                                                the main goal of vaccinating is to remove a certain disease from the landmass, and preferably the entire world. This has been done several times before, for example the plague. But because of certain individuals that don't vaccinate, this can't really happen, thus causing diseases to remain. There are also people that can't vaccinate, often due to being immunocompromised, too young or too old. These people could easily die, simply because some mongoloid anti-vaxer sneezed in their faces. Vaccinations should be mandatory for everyone, except for the immunocompromised that run the risk of dying if they did vaccinate.

                                                              • Ykario
                                                                Ykario  2 days back

                                                                Nope, the kids aren't responsable for their parents retardness, and they still endanger others

                                                            • CattAnimations
                                                              CattAnimations  2 days back

                                                              Karen’s like normal hate

                                                              • Vincent Alley
                                                                Vincent Alley  2 days back

                                                                Also, so what if your kid is autistic? They are basically saying that they don't want autistic people. Anti-vaxxers are even worse than we think.

                                                                • Семён Маликов

                                                                  If antivaxxers truly believe vaccines are evil, why are they vaccinated?

                                                                • Lancashirelad
                                                                  Lancashirelad  2 days back

                                                                  You know being autistic and hearing that parents would rather have their children die then "catch autism" makes me feel a bit disheartened if im being honest.

                                                                  At the end of the day from my angle it looks like these mothers want a trophy daughter/son to brag about, why they would brag about putting their own kid in physical danger most likely as its "against the norm" therefore they will be noticed easier, some people believe that big pharma is plotting some insidious plan and thats why they dont vaccinate others just use that as a cover from the reality of the situation I feel.

                                                                  • Nanybone
                                                                    Nanybone  1 days back

                                                                    Lancashirelad they think their child would get less serious side effects and be fine later

                                                                • Games Android
                                                                  Games Android  3 days back

                                                                  Dude,i did learn something Here that my School Will never teach us

                                                                  • Karl Håkansson
                                                                    Karl Håkansson  11 hours back

                                                                    @Games Android and may I ask how old u are?

                                                                  • Corey Playz
                                                                    Corey Playz  2 days back

                                                                    @Games Android Oh. Uh...

                                                                  • Games Android
                                                                    Games Android  2 days back

                                                                    @Karl Håkansson i'm from Brazil Bro...

                                                                  • Karl Håkansson
                                                                    Karl Håkansson  2 days back

                                                                    Well, I don't know what country you're from, but if you live in a civilised, developed country, you will be taught about vaccines, the dangers of not vaccinating, as well as the possible side effects, in school. Where I'm from, we talked about this about two years ago, in seventh grade, when I was thirteen.

                                                                • Why does this name
                                                                  Why does this name  3 days back

                                                                  Who else just came here for the anti-vaxx jokes?