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

  • Published: 12 May 2019
  • Sources:

    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?

    This video has been supported by a grant from the Bill & Melinda Gates Foundation.

    If you are interested how much sponsorships influence our videos, we wrote about that in detail here:

    Support us on Patreon so we can make more videos (and get cool stuff in return):

    Kurzgesagt Newsletter:
    Kurzgesagt Merch:

    The music of the video here:

    THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US:Marsha Sohn, Henri Holler, Michelle, Dan Crowley, Alex Hackman, Sammy Mikhael, Marcus Thorén, Kevin Harris, Jayami, Andreas Poletti, David Coates, Omar Galvis, Denny Zavada, Don Knowlton, Sebastian, Jay Ruthnam, Shakira Graham, MatBu, Mikhail, Sinan Taifour, Knowledge Unlimited, Odilia Krause, Anri Digholm, Dominykas, James Gaglio, Alice Jones, Narciso Jaramillo, Qaalid Hashi, Nate Bender, Gulyás Gergely, Michael Bloch, Rick Merced, Etienne Huguenot, Jonathan Lopez, Kai Smith, Benjamin Arndt, Philip Potvin, Amy Halter, Dylan polin, Zach Evans, Karan Chawla, Michael Casey, Francis Bouchard, William Gu, peck neck, Dien Buwono, Patrick Pruitt, Alexander Isayenko, Connor Doherty, Kierr Suñega, Kongpak Phupa, Lewis Foret, Daniel Ingegneri, David Saitta, Soeren Pollerhof, Ravi Shankar, Nico Kooyman, Anna Liceva, Dan Long, ADAM M., Cruz Godar, Pedro Caetano, Jean-Pierre Girard, Jonathan Piedrasanta, Jak SP, Jim Renney, Danielle Mitchell, Giorgio Valli, Ben Evans, Bill Cohen, Gitle Mikkelsen, Gemini00, Benjamin Mahoney, Christopher DiBattista, Mandy Reid, Gary Reckard, Sataporn Chaochonpun, Bigolf, Moses Malone, Kyle Merryman, Dante Bencivenga, Zeus Laser, Jake Wise, Jade, Fontaine Liu, Manav parmar, ethnicolor

    Help us caption & translate this video!

Comments • 65 037

  • 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.

  • ExoticFireGirl
    ExoticFireGirl  8 minutes back

    I really love how easy to understand yet scientifically correct the videos are. Really digging the comic book style and the humor too.

    • Kris.
      Kris.  18 minutes back

      "really bad time for 2 weeks"
      Sans: *_Did i hear bad time?_*

      • Dzoni
        Dzoni  19 minutes back

        It's not the vaccines that cause autism... it's the anti-vax movement.

        • Shay Sharawara
          Shay Sharawara  1 hours back

          I'm a live and not doing flue shot s no more . Not in 15 yrs .

          • Jessie Colt Goines
            Jessie Colt Goines  1 hours back

            I would rather my child get measles than receive the MMR vaccine. There have been no measles related deaths in the U.S. in 10+ years while the MMR vaccine has claimed more than 178 lives in the same amount of time. The measles death rate is only 1 in 10000 just as it was before the MMR vaccine was even on the market.

            • tatt oo sticker
              tatt oo sticker  2 hours back

              a child with autism by not vaccinating them. That's fucked up in many ways and an insult to kids actually living with autism because you're implying they're as bad as it gets

              • ShredderX32
                ShredderX32  2 hours back

                It's funny to think of all of the anti-vaccinate people that clicked on the video and got really dissipointed.

                • Krzysiek
                  Krzysiek  2 hours back

                  3:31 WawawWAIT! WHY? Did you just plan to slip that through? Why we need more vaccines, does it evolve so much that it is completely different from the memory? How the memory works on the strong-from-weakened-cousin then?

                  • Håkon Schulstad
                    Håkon Schulstad  2 hours back

                    Thank you so much for making these videos.

                    • Tainted Strike
                      Tainted Strike  2 hours back

                      thank you

                      • HenrikPiano
                        HenrikPiano  3 hours back

                        Thank you for talking in the listening part in our ZAP in Germany!
                        Great job!

                        • StrongRuler
                          StrongRuler  3 hours back

                          Vaccines aren’t always harmless, but there’s a treatment for most side effects, right?

                          • TentacleOne
                            TentacleOne  3 hours back

                            Everybody needs to see this. Thank you for educating the unwashed masses!

                            • Jm56Z
                              Jm56Z  4 hours back

                              3:11 : god damnit, I don't want to harm that little boi !

                              • james skelly
                                james skelly  4 hours back

                                It's sad that there a kids with autism whose parents are too busy trying to find something to blame for a unfortunate situation and not accepting facts rather then giving their full attention to loving their child

                                • Master_gamer22344
                                  Master_gamer22344  4 hours back

                                  Also known as anti vaxxers

                                  • TheOfficeChair
                                    TheOfficeChair  4 hours back

                                    Please make a 5g video similar to this video.

                                    • ghjoshman99
                                      ghjoshman99  5 hours back

                                      I desperately tried to find anti vax comments but couldn't. If a cool pal wants to copy and paste what they find and put them here I would appreciate it very much

                                      • eeeaten
                                        eeeaten  6 hours back

                                        It’s likely that forced/mandated vaccination actually results in lower vaccine coverage. When people are given accurate information they almost always choose to vaccinate. The biggest problem I see is that here are a bunch of fairly unrestricted loons spreading misinformation about vaccines to undermine medicine and drum up business for their fake-ass “natural health” miracle cures/products/therapies/books/dvds.

                                        • Elmar Kitos
                                          Elmar Kitos  6 hours back


                                          • doot
                                            doot  6 hours back

                                            honestly i respect anti-vaxx parents, when their kid finally dies they can just say "it was lies told to me by the internet"

                                            • Ajay Malolan
                                              Ajay Malolan  7 hours back

                                              Great video

                                              • Cosmosit
                                                Cosmosit  7 hours back

                                                I'm gonna send this video to all anti vaxxers I know and meet

                                                • LeoTheArtist
                                                  LeoTheArtist  7 hours back

                                                  Even tho I do support this stuff its just the fact that I have a vary bad phobia of needles...

                                                  • Francklyn
                                                    Francklyn  6 hours back

                                                    Death or landing in a wheelchair thanks to polio is worse

                                                • Iodic Acid
                                                  Iodic Acid  7 hours back

                                                  Another thing i never understood about anti vaxxers is even if let's say hypothetically vaccines cause autism, you're basically saying that you'd rather have a dead child than have a child with autism by not vaccinating them. That's fucked up in many ways and an insult to kids actually living with autism because you're implying they're as bad as it gets

                                                  • eeeaten
                                                    eeeaten  6 hours back

                                                    Iodic Acid no they are not saying they’d rather have a dead kid. That’s absurd. They’re saying the if the risk of autism from the vaccine is high and the risk of harm from the disease is low, they’d rather go with the lower risk. Luckily vaccines don’t cause autism.

                                                • Standing With The Band
                                                  Standing With The Band  7 hours back

                                                  Another important fact tossed in with my own story of me not getting vaxxed.

                                                  In high school, students needed two vaccinations or have parents sign forms stating the kids weren’t being vaccinated for whatever reason.
                                                  I was going through a very rough latch with my depression, anxiety, and other serious topics I won’t get into. The meningitis vaccine has behavioral issues and/or changes listed as a side effect. My mother didn’t want me to worsen due to my mental state and decided we would get it at a later date when I was more stable.

                                                  When I went in to get the other vaccination, however, the doctor asked why we weren’t doing both and we explained. He let us know that anytime someone has a reported side effect that it gets listed. Even if the side effect isn’t actually a side effect of the vaccine or even if it is just one person. I has to be included.
                                                  This goes for all vaccines, over the counter medications, and prescription medications.

                                                  These behavioral changes might have stemmed from a kid having undiagnosed ADHD, having a hard time in school and being extra stressed, literally anything. He didn’t specify that but did assure us that a lot of the side effects aren’t actual side effects and are usually just reports from parents and have to be listed anyway.

                                                  So we got it that day, too.
                                                  And no, I didn’t get worse at all. Instead, I’m not passing around meningitis!

                                                  When looking at side effects of anything, take it with a grain of a salt. Sometimes our brains will also make us feel like we are experiencing side effects when we really aren’t, almost like a placebo effect. Whatever side effects are real and most common, the doctor should inform you or will inform you if you ask.

                                                  For new medications, my doctor let me know which side effects were most common, which is almost definitely will get, for how long, and what to look for if it’s bad. Were there more listed? Yes, but there’s a possibility that they aren’t actual side effects and just people worrying or giving the wrong attributes to things in the medical field.

                                                  • Janglenutter
                                                    Janglenutter  7 hours back

                                                    My son spent four days in the hospital with a reaction from vaccines. He's fine now, but don't ever let anyone say they're totally harmless.

                                                    • Janglenutter
                                                      Janglenutter  3 hours back

                                                      +eeeaten I never said it wasn't. I said never let anyone tell you vaccines are totally harmless, because they aren't.

                                                    • eeeaten
                                                      eeeaten  3 hours back

                                                      Janglenutter you realise though, that a rash and fever is a common symptom of measles. Getting vaccinated is a much better option than not getting vaccinated.

                                                    • Janglenutter
                                                      Janglenutter  5 hours back

                                                      +Safia's Useless Acc. It's common enough that both agencies list them as common side effects.

                                                    • Safia's Useless Acc.
                                                      Safia's Useless Acc.  5 hours back

                                                      Janglenutter doesn't mean other people will have this reaction.

                                                    • Janglenutter
                                                      Janglenutter  5 hours back

                                                      +eeeaten He was hospitalized with a high fever, rash and loss of appetite. Which is according to the CDC and UK national health service, a common set of side effects to the MMR vaccine.

                                                  • Mijuna Blue
                                                    Mijuna Blue  7 hours back

                                                    This needs more recognition

                                                    • Just a Random Gamer
                                                      Just a Random Gamer  7 hours back

                                                      Who else just came to see the war in the comments xD don’t worry tho I watched the video cause I came here for that too lol

                                                      • Sean Costello
                                                        Sean Costello  8 hours back

                                                        [ Karen disliked that. ]

                                                        • Alektorophobic Carrot
                                                          Alektorophobic Carrot  9 hours back

                                                          Me when I see another of my favorite informational channels might be anti-vax:
                                                          Ah shit, here we go again

                                                          • eeeaten
                                                            eeeaten  6 hours back

                                                            Alektorophobic Carrot another? What?

                                                        • Lenfi X
                                                          Lenfi X  9 hours back

                                                          That GTA reference tho 👌

                                                          • ZacZattack
                                                            ZacZattack  9 hours back

                                                            I'm going to quote Soot house here.
                                                            "What I'm saying is that the Black Death disappeared in Europe with out vaccines"
                                                            "Along with 1/3rd of the population"

                                                            • Stephen Stumpf
                                                              Stephen Stumpf  9 hours back

                                                              Finally, common sense!

                                                              • Strawberry Pupper
                                                                Strawberry Pupper  9 hours back

                                                                Oh look the dislike count, everyone look, a viral infection happening right before our eyes. Watch as moms spread a deadly virus making numbers like this.

                                                                • Strawberry Pupper
                                                                  Strawberry Pupper  9 hours back

                                                                  Anti Vaxxers are the most dumb people ever, letting their immediate fears for their child overcome the potential dangers that lie ahead for that child. They become delusional believing that anything fake and not made directly from the earth is toxic, even if the body needs it. Other children are impacted by idiot parents that eat wild anti-vax tales like a cow to grass, or better yet, a sheep. These sheeple eat the anti-vax stories and get infected with the deadly AVV, or Anti-Vax Virus, and harm those around them by spreading the illness to anyone else who doesn't have the proper immune system to fight off lies. Those infected will blindly let their kid face a viral world, alone, on the hope and prayer that the "facts" they read on the internet will protect their child.
                                                                  What's worse, true pro anti-vaxxers are completely heartless, believing that if their child is autistic, that is wrong, they are imperfect. They will face the high risks of disease and death, both of which being expensive and horrific events for a child way too young to understand, they will choose all this, over having an autistic child. That's horrifying that they can throw their love away. As a person on the spectrum, albeit on the more functioning side, I can attest that autism is not at all, not ever going to be such a big issue that overpowers a parent's love. And this is all assuming vaccines cause autism!! Playing devil's advocate! Drawing conclusions on false facts and suspicions. If you've vaccinated your child, or plan to, pat yourself on the back, because you've saved their life, you've proven that love is without fear and doubt.

                                                                  • Fitnessgram Pacertest
                                                                    Fitnessgram Pacertest  9 hours back


                                                                    *MEGALOVANIA INTENSIFIES*

                                                                    • Waldemar Perez Jr
                                                                      Waldemar Perez Jr  9 hours back

                                                                      What do you say to people who work in the medical field but who are also anti-vax?

                                                                      • eeeaten
                                                                        eeeaten  6 hours back

                                                                        Waldemar Perez Jr that their “medical field” of homeopathy or chiropractic isn’t actually medicine?

                                                                      • Fresh Pixelated Memes
                                                                        Fresh Pixelated Memes  9 hours back

                                                                        "You're fired"

                                                                    • Black Fang
                                                                      Black Fang  10 hours back

                                                                      Only times I get sick is after vaccines

                                                                      • Fresh Pixelated Memes
                                                                        Fresh Pixelated Memes  3 hours back

                                                                        Flu shots can't give you the flu because unlike other vaccines they don't actually have a live virus

                                                                      • eeeaten
                                                                        eeeaten  3 hours back

                                                                        Black Fang the facts are: getting a flu shot halves your chances of getting the flu; you can’t get the flu from a flu shot. If you don’t accept these facts you’re making decisions based on faulty information.

                                                                      • Safia's Useless Acc.
                                                                        Safia's Useless Acc.  5 hours back

                                                                        Black Fang how do you know what you got was specifically the flu

                                                                      • Black Fang
                                                                        Black Fang  6 hours back

                                                                        +eeeaten and if I recall I said I will continue getting flue shots but it will be on my own time I don't like objects and sickness slowing my work I will get on when I have a empty schedule for sickness

                                                                      • Black Fang
                                                                        Black Fang  6 hours back

                                                                        +eeeaten and yet I can get sick from it

                                                                    • Theconmicbud
                                                                      Theconmicbud  10 hours back

                                                                      Vaccines should be a law

                                                                      • Space
                                                                        Space  8 hours back

                                                                        the problem is people do have a right, so its on them to vax!

                                                                    • Manoj ji
                                                                      Manoj ji  10 hours back

                                                                      vaccines are meant to lower the chances of getting a disease, but not 100%. anyone could still get it. its not vaccines that cause autism, its the mylin sheath process that occurs in a cellular structure and disintegrates it. sometimes you could have it in your system for life because of memory cells. but remember this...a fully alkaline state of body diet will always have strong defense against diseases and cancers as well.

                                                                      • Cpapa18
                                                                        Cpapa18  10 hours 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  10 hours 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  10 hours back

                                                                            My neighbor legit vaccinated their pets but not their kids.

                                                                            • Francklyn
                                                                              Francklyn  6 hours back

                                                                              Pretty obvious which one they want to keep

                                                                          • panggop jio
                                                                            panggop jio  11 hours back

                                                                            Saying vaccines cause autism is like saying video games cause violence

                                                                            • Francklyn
                                                                              Francklyn  6 hours back

                                                                              Clearly you have never played Mario Kart

                                                                          • Lepel
                                                                            Lepel  11 hours back

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

                                                                            • Evèłýň ERROR
                                                                              Evèłýň ERROR  11 hours back

                                                                              No one:

                                                                              20.000 KIDS WILL DIE FROM MEASLES!

                                                                              Edit:300.000 KIDS WILL DIE RITGHT NOW!