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 • 80 825

  • 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.

    • New Antarctictangle/JoMiMi
      New Antarctictangle/JoMiMi  4 days back

      You can't convince me, this is all FAKE NEWS. Vaccines cause autism, HIV, and are made from poison. They cause death as well. If you were to do the real science, you would find that there are facts to back this up, and they are a COVER-UP by the GOVERNMENT. The government puts harmful chemicals in our vaccines, leading our children to be mind-controlled by the government.

    • OfftoShambala
      OfftoShambala  2 weeks back

      K-Tech PL no I don’t want to sneeze on unvaccinated children I don’t like but I laugh at the vaccinated children when they go into seizures... that’s super funny every time... if you call the doctor, they will tell you seizures are normal... might as well have fun with that?

    • DMGamer99 DMGamer99
      DMGamer99 DMGamer99  1 months back

      *Takes anti-vaxers seriously*

    • Jaxson Presley
      Jaxson Presley  2 months back


  • Kiing Kyotic
    Kiing Kyotic  2 hours back

    Vaccines are terrible for the environment

    Because they keep humans alive

    • Retard
      Retard  3 hours back

      anti vaxers must've been vaccinated when they were young
      they are suffering from a serious case of autism

      • Santiago Agustin Rojas Ruiz

        Looks like there's a cell war in my body now...

        • prince joopie
          prince joopie  5 hours back

          Bro I wish I wasn’t vaccinated. Now I have autism AND I’m alive.

          • the joke woooshed over my head

            you dont get anything from vaccination other than needle mark

            • Elizabeth Wines
              Elizabeth Wines  8 hours back

              the joke woooshed over my head on the outside

          • The J.A.P
            The J.A.P  9 hours back

            Most of ur viewers are 12 or below so ur talking to kids lol

            • Galvxnize
              Galvxnize  3 hours back

              Are you 6

              Oh wait you don’t get that old

            • Dinobrine 19
              Dinobrine 19  6 hours back

              I just saw your other comment... your to young to be here. Go to kid tube.

            • Dinobrine 19
              Dinobrine 19  6 hours back

              So your saying that your also under 12

            • Rip
              Rip  8 hours back

              What a nice dream you have!

          • The J.A.P
            The J.A.P  9 hours back

            I’m only 11 and I hate vaccines...

            • Elizabeth Wines
              Elizabeth Wines  8 hours back

              The J.A.P well you’re not one of us kids anymore, go sit in the corner

          • Dikko Daniswara
            Dikko Daniswara  10 hours back

            Nocebo effect?

          • Shadow ShaBoink
            Shadow ShaBoink  10 hours back

            Every person quote disliked this video is an anti-vaxer

            • WhiteNiteHero
              WhiteNiteHero  10 hours back

              When I was a baby, I ended up getting pneumonia, surprisingly though, I got it FROM the vaccines. Idk why but I feel like I shouldn’t use something that almost killed me :/

              • Elizabeth Wines
                Elizabeth Wines  8 hours back

                WhiteNiteHero don’t have to like it, but we still need to take them but you prolly don’t need to take that particular vaccine agian

            • Duatia
              Duatia  13 hours back

              we know that vaccines cause mental defects because of all the anti vaxxers whose parents vaccinated them, turning them into idiodts who think vaccines are bad.

              • Josh Balane
                Josh Balane  13 hours back

                How can we ever hope to explore the stars if we cant even agree on vaccinating our kids

                • pumkin spice animations
                  pumkin spice animations  13 hours back

                  I have a cousin wich has outism (sorry I don't know how to spell it ) and it makes me so angry to here a Karen talking about how she only didn't vacsinate her child just because she doesn't want them to become autistic.Atisum is not a thing you can get ifected with its a thing that your born with but most of the time it actually starts to show up later in life (if I'm wrong please correct me)

                  • MeliodasGod
                    MeliodasGod  20 hours back

                    any anti-vaxxer would say that the cure is snake oil

                    • Kat Spectrum
                      Kat Spectrum  22 hours back

                      wat if pro diseases just want to die and dats y they do dis

                      • Pixel
                        Pixel  23 hours back

                        Sucks, I have to get my flu shot in 4 weeks. :|

                        • makiiz
                          makiiz  22 hours back

                          Think about it.
                          You'll mildly suffer for around 5-10 seconds, and then it'd be over.
                          If you had the flu, it'd last for days to weeks.
                          I like to think about that when I get my shots because it makes me feel better.

                        • Jersen Mapper
                          Jersen Mapper  22 hours back

                          At least you won’t die.

                      • Pygmy Puff
                        Pygmy Puff  23 hours back

                        Title: The Side Effects of Vaccines
                        Antivaxxer: TOLD YOU!!!

                        • Typical Asian Guy
                          Typical Asian Guy  23 hours back

                          The only "vaccine injured" thing that happened was, that my arm started hurting only for 1 hour and hurt when I moved it

                          **BUT HEY ATLEAST I DIDNT GET THE FLU**

                          • I Had To Change My Name
                            I Had To Change My Name  24 hours back

                            Karen says no

                            • Grant Deibler
                              Grant Deibler  1 days back

                              Yeah I’m talking to you karen

                              • SupahGaminNerd
                                SupahGaminNerd  1 days back

                                honestly this video makes the anti-vaxx movement disgusting and abhorent, religious reasons? as long as your religion does say it explicitly and you don't try to be "scientific" to explain it, then sure, but if your only reason is you don't want it? then you are actively putting your child in danger, in my opinion, a god who would rather our kids suffer for weeks from a potentially fatal disease and not want us to prevent suffering is a god I would never worship, I'd rather literally go to hell then deal with a god like that, that's the kind of god that makes you think "hey, maybe satan had a fucking point"

                                • Calling Tzz R
                                  Calling Tzz R  1 days back

                                  Take that Karen

                                  • Andy T
                                    Andy T  1 days back

                                    I KNEW IT.
                                    everybody else:

                                    • Lorenzo
                                      Lorenzo  1 days back

                                      You hear that anti-vaxxers??? You essential oils AINT DOING SHIT against the measles!

                                      • juan pedro suárez
                                        juan pedro suárez  1 days back

                                        *memory cell awakes,vietnam war flashbacks intensifies*

                                      • GamingDemonSoul
                                        GamingDemonSoul  1 days back

                                        If you are an anti-vax mother, 3:54 is for you.

                                        • hoomanwithsause
                                          hoomanwithsause  1 days back

                                          8.5k dislikes...

                                          • The Life Of Justin & Carolina

                                            The comments on anti vaccinated children are horrible . How can you wish death upon a child or try to predict that they will die .

                                            I've never had the flu vaccine and never had the flu. Yet people get the flu more times imaginable even after they got vaccinated ? Ok

                                            • random commenter here dont mind
                                              random commenter here dont mind  9 hours back

                                              @WhiteNiteHero umm mo

                                            • Vary Olla
                                              Vary Olla  9 hours back

                                              Sorry WNH = but someone is feeding you a line.  The pneumococcal vaccine such as is given to children and older people = is a "conjugate" vaccine.  That means that like all recombinant vaccines it contains - not an entire or "whole cell" pathogen - but rather only the antigenic proteins/peptides of pathogens..........or pieces of them.

                                              Moral of the story.  It is physically impossible for a piece of a bacterium to replicate as it is merely strains of the peptides which are found on the cellular membrane of the bacteria.  This means the vaccine could not give you pneumonia because it is not made up of actual living bacteria = only pieces of them.  The antigenic parts are really all that matter because those are what your immune system reacts to. 

                                              So it is sometimes possible that a few people react harshly to be vaccinated.  That however is reflective of something wrong with them and not the vaccine since vaccines are made to be tolerated by as many people as possible.  So if 1 million people can eat peanut butter - but 1,000 find out they have a peanut allergy - that does not make peanut butter "bad".  It just means a small number have an idiopathic issue within them which makes them unable to tolerate what most folks can.   This means those rare adverse reactions must then be compared to what we would expect to see anyways if we simply allowed the infectious diseases to burn through the land as they once did in the time before a vaccine. 

                                              History shows those serious adverse reactions to vaccination occur at a rate exponentially less than what we used to see anyways in the time before the vaccine = making the vaccine a better option since infectious pathogens exist in nature and thus in human populations.  You are at risk regardless as you do not live in a vacuum. So you must look at the larger picture here.   Have a nice day.

                                            • WhiteNiteHero
                                              WhiteNiteHero  10 hours back

                                              As a baby, I actually got pneumonia, Surprisingly though, I got it from vaccines. I see what I believe, so I’m avoiding vaccinations considering that I almost died because of it :/

                                            • Jdogwoof66
                                              Jdogwoof66  10 hours back

                                              @Vary Olla thank you for being smart

                                          • Halfblood Princess
                                            Halfblood Princess  1 days back

                                            I am a biologist and everything this anti-vaxxers say about vaccination is a big load of egocentric bullsh*t. The reason people should be vaccinated is the herd-immunity, that protects the weakest of society (babies and immun-suppressed people) from dying of measels.
                                            Antivaxxers are a very big and life-threatening danger for their babies and the babies of other people (if their unvaccinated kid gets the measels at 6 years old and infects *your* baby, it may not survive).

                                            • Again And again
                                              Again And again  1 days back

                                              Isn't that the marvel cinematic universe 4:55

                                              • one sad boi
                                                one sad boi  1 days back

                                                anti vaxxers:i won't vacccinate my kid!
                                                mean inttelectual thinking should i vaccinate again

                                                but for serious is it dangerous to vaccinate twice?

                                                • Zak1999
                                                  Zak1999  1 days back

                                                  I rewatch video just to read the comments

                                                  • Zak1999
                                                    Zak1999  1 days back

                                                    Thanks you Edward Jenners for discovering the vaccine

                                                    • secrekt
                                                      secrekt  1 days back

                                                      Who else came from anti-vax kids meme

                                                      • Lucy Black
                                                        Lucy Black  1 days back

                                                        Thank you for making our society more aware of this problem in youre's way. Your films are always popular and intresting also in my school we are watching your films to practise our english in intresting way ( I'm from Poland). It makes me more hopefull for humanity when I see someone trying to tell people the truth about how they acting ,what they are doing and consequences of aur actions.

                                                        • Kaya Thomson
                                                          Kaya Thomson  1 days back

                                                          Well I have studied for hours on end and I have come to the conclusion that vaccines cause some very serious effects!
                                                          These include having a healthy human body, resistance to serious lethal diseases and maturing to average age! Please inform people of these effects!

                                                          • pikmin squid
                                                            pikmin squid  1 days back

                                                            Thanks, but they also have made research and shown the side effect KAREN

                                                        • Jodie Jones
                                                          Jodie Jones  1 days back

                                                          Flu vaccine. Biggest scam going.

                                                          • Cuckwit
                                                            Cuckwit  3 hours back

                                                            Jodie Jones

                                                            It’s free

                                                          • Kaya Thomson
                                                            Kaya Thomson  1 days back

                                                            @Rip You deserve a medal of common sense.

                                                          • Rip
                                                            Rip  1 days back

                                                            Essential Oil. Biggest killer at all time.

                                                        • Erik Mäkipää
                                                          Erik Mäkipää  1 days back

                                                          thank you.

                                                          • Steven Asprinio
                                                            Steven Asprinio  1 days back


                                                            • Saumit Vaidya
                                                              Saumit Vaidya  2 days back

                                                              The title should be
                                                              ANTI VAX MOMS : The Origin

                                                              • Saika Asashi
                                                                Saika Asashi  2 days back

                                                                I don't think I'm risking to catch any Autism by having vaccines, considering I'm already diagnostiqued with Asperger Syndrome ahah.

                                                                • Lucas Iago
                                                                  Lucas Iago  1 hours back

                                                                  @Saika Asashi Thanks for answering! Also do people usually discriminate you, or that's not common? Also, do you think that getting bored easily is because of the syndrome or not? Also, sorry for all the questions, its just that im a curious person and i have the opportunity not only to understand a different view of the world, but to talk to someone who is not from my country, but, If you think this is boring, i will understand.

                                                                • Saika Asashi
                                                                  Saika Asashi  2 hours back

                                                                  @Lucas Iago I'd say it'd be easier to list what it does not "affect". I mean, "affect" is a pretty innacurate way of describing it, since I was basicaly born with it.

                                                                  What I'm pretty sure of is that we don't see the world as most people. Most won't understand my actions because unlike most I'm not following behavioral predetermined pattern.

                                                                  Also, I see that some will consider us as heartless people, unable to understand other people emotion, but I don't think that's quite right.
                                                                  I mean, I manage to know when someone is angry, sad & the like, but it won't affect my own mood.

                                                                  Also, most things bore me to death.

                                                                • Lucas Iago
                                                                  Lucas Iago  5 hours back

                                                                  You do? How does it affects your life? If you dont mind answering, of course. Sorry if im bothering you.

                                                                • pikmin squid
                                                                  pikmin squid  1 days back


                                                              • falco830
                                                                falco830  2 days back

                                                                Although I have been vaccinated, I’m still hesitant about the Chicken Pox vaccination. Because I had chicken pox when I was young, and thus I didn’t need the vaccination when they came out with it, but my brothers had their vaccination and missed out on the brutal fevers that chicken pox threw at me... however they seemed to end up with more health problems like asthma and allergies, where as I don’t have any of those and am immune to those allergies. I’m not so sure if stopping all tough sicknesses from affecting your children is the go to solution. But definitely vaccinate for the obvious deadly diseases.

                                                                • Richard Gregory
                                                                  Richard Gregory  2 days back

                                                                  @lilani beaud'arc It certainly does. My mom is asthmatic and suffers with hayfever (both of which she passed to me). Neither her parents nor her brother has the slightest problem with either. Moreover, it was my mom in childhood who got virtually everything (as this was in the 1930's, long before the big vaccination programs), and almost always got it badly. When she had chickenpox she got convulsions from the fever and it left permanent scars. It's far too easy to imagine causative links between unconnected events; humans are very good at recognising patterns, but often see them where there is no actual pattern at all. Children very often show the first signs of allergies *after* the age they receive vaccines. This was true even before vaccines. Also worth noting that my lifelong asthma was probably made worse by the fact that I got whooping cough - I was too young to have the vaccination, and one of the kids in the neighbourhood wasn't vaccinated, and spread it around. You're not "immune" to an allergy. An allergy is simply your immune system mistaking something harmless as something harmful and attacking it. I am allergic to grass pollen, which is harmless, but my immune system regards it as a dangerous invaders, and reacts by trying to expel it with sneezing, runny nose, watering eyes and so on. I'm also allergic to shellfish, and if I eat that I get the same symptoms as you'd get from food poisoning.

                                                                • lilani beaud'arc
                                                                  lilani beaud'arc  2 days back

                                                                  i think your brother is just alergic. it happens, sometimes.

                                                              • Wafflez Win
                                                                Wafflez Win  2 days back

                                                                I’ve been finding lower species, non-thinking organisms but they are getting smarter, but my studies show they learning how to speak and think. Sooner or later these beings will go extinct will no thought or documentations of them. So please, study them while you can. Before there gone. I’m also moving to Mars so contact me when these idots are gone.

                                                                Side Note: I just got vaccinated last week so.....yeah, I ain’t dead yet. Or not yet at least but I think I’m getting autism

                                                                • J.R. Mayer-Bahr
                                                                  J.R. Mayer-Bahr  2 days back

                                                                  Definitely learned something, thank you for this great and easily digestible video!

                                                                  • Kevin Liu
                                                                    Kevin Liu  2 days back

                                                                    The little things in this video are cuter than usual

                                                                    • Laza Gamer
                                                                      Laza Gamer  2 days back

                                                                      I feel every Karens rage watching this video

                                                                      • Zenthic Epic
                                                                        Zenthic Epic  2 days back

                                                                        Vaccines still cause autism!!

                                                                        • Cape without a hero
                                                                          Cape without a hero  19 hours back

                                                                          @Zenthic Epic Wow. How funny and creative. Really got us there didn't you? Man, such an original joke, it's mind boggling how clever you are. And man, that "xdddddd" just to top it all of, you're a real master of comedy, huh?

                                                                        • pikmin squid
                                                                          pikmin squid  1 days back

                                                                          You're a troll, right

                                                                        • Zenthic Epic
                                                                          Zenthic Epic  1 days back

                                                                          Your all stupid lmao get jebaited xddddddxd

                                                                        • Kaden Smith
                                                                          Kaden Smith  1 days back

                                                                          Zenithic did you not watch the video?

                                                                        • Rip
                                                                          Rip  1 days back

                                                                          That's anyone who trust Google than anything else.