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 • 73 204

  • 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.

    • Get Pugger
      Get Pugger  2 weeks back

      Clint Ofray did your brain kill itself because it knew you were no hope

    • Ese Callum
      Ese Callum  1 months back

      vaccines are not subject to the safety rigors undergone by other pharmaceuticals in the FDA approval process. There are no large scale, double-blind, placebo controlled studies. And, in the one 1930 human study of thimerosal that predated its use in vaccines, all the subjects injected with thimerosal died. In 2004, an FDA official acknowledged in testimony before a Congressional committee, that no government or privately funded study has ever demonstrated thimerosal’s safety. On the other hand, there is plenty of science suggesting that thimerosal is NOT safe. Several hundred studies available on PubMed link thimerosal exposure to the neurodevelopmental and immune system diseases that are now epidemic in the generation of American children born after the CDC dramatically increased childhood thimerosal exposure starting in 1988. My book, Thimerosal— Let the Science Speak, summarizes these studies. The scientific literature inculpates increased thimerosal exposure as a culprit in the explosion of ADD, ADHD, speech delay, narcolepsy, SIDS, ASD, seizure disorder, tics and anaphylaxis, including asthma and food allergies. According to the CDC, one in six American children—the so called “thimerosal generation”—now suffers from a developmental disability. We have published a compendium of 80 published, peer-reviewed studies that strongly suggest a link between thimerosal exposure and autism.

    • jsmyth024
      jsmyth024  2 months back

      I'm sorry, but we are the sickest species ON THE PLANET. Just think about that for ONE minute.
      Our gut microbiome is being sterilized by pesticides like round up, and we are told they are safe(yes, they kill the bacteria in your gut - shocker), but DON'T WORRY, they have something you can buy for that.

      We are developing autoimmune diseases left and right. A study was just released that shows how millennials health plummets at around age 27, and no one is concerned that it's something to do with out healthcare? "healthcare" - that's a misnomer at this point.

      The SAME people that push round-up as being safe(now proven to cause cancer in a court of law), "provide" us with cancer treatments and vaccines.

      The same people who sell us vaccines, treat our children of these chronic illnesses. NO ONE is brave enough(or intelligent enough) to raise an eyebrow to that?

      Oh, wait, they are, but then they are told they are just crazy conspiracy theorists who are probably literally hitler and voted for trump. And people fall for it because it makes them FEEL safe. Meanwhile over FIFTY PERCENT of our youth(YOUTH!) have chronic illnesses that the AMA says they will NEVER recover from. And it's not enough for these mega corps to make millions or billions, now they are pushing for trillions.

      That's not fishy to you guys?

      I swear, people have thrown common sense directly out of the nearest window for, "double blind published data" We will NEVER get it. There are too many variables involved and you know this, that's why you keep asking.

      Honestly it makes me sick and people who are working for them should be ashamed of themselves. They aren't, because they have money in the bank, but one day, people are going to have had enough and they will be found and prosecuted.

      How many more of our loved ones have to suffer and die before it gets to that point?

    • frick ajit pai
      frick ajit pai  2 months back

      Kurzgesagt – In a Nutshell epic

    • joel marin
      joel marin  2 months back

      thank you for making this video, its been a great help for my social justice project. I hope to use this as a source to help write my letter to a politician, (who is undecided as of writing this), I really hope to make a change and to make vaccinations more mandatory in the united states!

  • C & C Miller
    C & C Miller  24 minutes back

    Karens : reads about vaccines causing autism and doesn't vaccinate their kids.

    Unvaccinated children : *has autism*

    Karens : *impossible*

    • stealthninja playz
      stealthninja playz  3 hours back

      ladies and gentle men we got em

      • stealthninja playz
        stealthninja playz  3 hours back

        this click bait is good

        • Monroe Robbins
          Monroe Robbins  3 hours back

          A) Thank you for making this video! Even though we know that vaccines are important to stay alive, but it’s good to recognize how vaccines work, and why they’re so useful. And B) wouldn’t it still technically be your body getting stronger if you don’t die? Your body creates memory cells, which makes your immune system stronger against diseases. Though, if I’m wrong, my sincerest apologies, I’m just curious.

          • Tens
            Tens  3 hours back

            Is this channel made from the government

            • Constantine
              Constantine  4 hours back

              Tobacco smoking industry 1940's: tobacco smoking is perfectly safe, they do not cause lung cancer
              Vax cult parrot 2019: vaccines are perfectly safe, they do not cause autism
              Religion of Scientism, worst state of collective science..

              • Food Is good
                Food Is good  2 hours back

                So just because we were wrong once means that we are always wrong? What facts do you have that vaccines are bad, the good outweighs the bad.

              • Food Is good
                Food Is good  2 hours back

                Constantine your really stupid aren’t you

            • Pizza Lover
              Pizza Lover  4 hours back

              I had measles I felt really sick I thought it was just a normal sickness now I see I was lucky to live?

              Edit: is it also common for kids that got there vaccine injections to have measles cuz I did

              • Benji Reil
                Benji Reil  5 hours back

                so what ur saying is vaccines made me gay?

                • Remi Lalaque
                  Remi Lalaque  6 hours back

                  This video is beautiful

                  • Remi Lalaque
                    Remi Lalaque  6 hours back

                    I love the animation

                    • DJ Sillz
                      DJ Sillz  6 hours back

                      When i got vaccinated i got a bit of swelling on the forearm

                      • Andrew Bergamann
                        Andrew Bergamann  10 hours back

                        I'm glad Kurzgesagt developed a vaccine against anti vaxxer's disease

                        • Louie Cross
                          Louie Cross  10 hours back

                          do one about autism please im autistic and want to find out more

                          • ice pheonix studios
                            ice pheonix studios  11 hours back

                            Umm no,vaccines cause a lot more deaths than lifes saved and vaccines are just injections with robots in them that are made by the government to Spy on us everywhere,essential oils and other natural herbs are better than vaccines i cant believe people still think vaccines are good

                            • Rhys Dooley
                              Rhys Dooley  2 hours back

                              All diseases will run from my body of oil and flinstone gummies

                            • Vincent Kierkels
                              Vincent Kierkels  3 hours back

                              @ice pheonix studios This is just how Pewdiepie got his subs! Please continue.

                            • ice pheonix studios
                              ice pheonix studios  11 hours back

                              Before You comment...just wanna Say i dont believe in what i just said i just wanted some more subs...please subscribe DX

                          • The Backyard Man
                            The Backyard Man  11 hours back

                            Anti vax mom: cries in corner after being *ooft

                            • rammenstein
                              rammenstein  15 hours back

                              I remember a few years ago, there was a commercial airing on TV about Whooping Cough. The first time I saw it, my only thought was 'Whooping Cough? Who the fuck gets Whooping Cough?! I thought we all but eradicated that!" It's really sad that this anti-vaccination BS is bringing back diseases that had been practically unheard of for generations.

                              • Vary Olla
                                Vary Olla  5 hours back

                                You got it!  Once upon a time many infectious diseases were "endemic" = meaning that outbreaks were self-sustaining and thus they were ubiquitous across the land.  Then as a result of mass vaccination programs = over a period of years we saw massive reductions in incidence as the cumulative herd immunity built up.  Net result: few people alive today have ever seen a case of many of these things.

                                Unfortunately as the old saying goes:  _"history repeats itself."_  This happens because subsequent generations forget the hard-fought lessons of previous ones.  So the young people today who represent many of the anti-vaxxers = grew up in a world where things like whooping cough were basically nonexistent.  That made the concept of infectious disease prevention abstract in their minds as they had never seen a case = and accordingly they incorrectly believe that vaccines are unnecessary.

                                So the moral to the tale is that you do not live in a vacuum.  Infectious disease pathogens exist in nature - and thus in human populations.  Accordingly you are always at risk.  We can then either mitigate that risk via vaccinations = or suffer the results of the breakdown of that herd immunity which took decades to build up............and once again these things will rear their ugly heads.  Have a nice day.

                              • Adrian Vera
                                Adrian Vera  14 hours back

                                rammenstein exactly

                            • Luke Phillips
                              Luke Phillips  17 hours back

                              when the adults who don’t vax their kids are vaccinated

                              • Ayden Racco
                                Ayden Racco  19 hours back

                                This needs to be shown and shared everywhere

                                • Jazz Santana
                                  Jazz Santana  19 hours back

                                  You could make a great Pixar movie with those memory cells

                                  • Evanston Conner
                                    Evanston Conner  23 hours back

                                    the mipisecond that someone says vaccines cause autism or any mental disability they are gonna be hit in the face

                                    • Terrifying Blaze
                                      Terrifying Blaze  24 hours back

                                      antivaxer:vaxines have a DANGEROUS SIDE EFFECT

                                      Me:yeh the side effect is ANTI VAX SHAAAAME

                                      • Terrifying Blaze
                                        Terrifying Blaze  24 hours back

                                        For those who don’t get the joke the anti vax shame is the vaxinated kid lives lol

                                    • Carl Heffner
                                      Carl Heffner  1 days back

                                      Karen: still has sideffects so i will never use it

                                      • Elbereth Varda
                                        Elbereth Varda  1 days back

                                        I will never understand why people believe that their amount of hours spent in Google are more valuable than the several years their doctors spent at the university. Human life has improved a lot since Science and progress took over, so many people have bleed in order to achieve what we have right now. So, please, someone explain to me: Why are these idiots insulting our doctors, our historical memory and their own intelligence?

                                        It must have something to do with narcissism: since the actual knowledge doesn´t register properly in their brains, instead of making the effort to learn, they choose to follow a shortpath to "knowledge" so they'd feel better with themselves?

                                        Boh. At least both the video and your comments are awesome. Thank you! XD¡

                                        • Lil Phil
                                          Lil Phil  1 days back

                                          It’s kinda like if everybody eating food and one person at random assumes it’s poison in the food

                                          • Thorn'Tooth
                                            Thorn'Tooth  1 days back

                                            You know, when my cousin got vaccinated, she got HORRIBLE symptoms like not getting sick, not dying, not fainting and not coughing as much when she did get sick!! HORRIBLE!!!

                                            (This is a joke, if you want to argue argue with someone else 😗)

                                            • Thorn'Tooth
                                              Thorn'Tooth  8 hours back

                                              @Adrian Vera I mean sure but my points are pretty good for example

                                              • cats are cute and very relevant
                                              • I forgot to water my plants
                                              • Milo is amazing
                                              • I haven't done my homework
                                              • grapes
                                              • hand sanitizer
                                              • pasta

                                              As you can see, my points are very, VERY good. I am a professional debater, if you couldn't already tell.

                                            • Adrian Vera
                                              Adrian Vera  13 hours back

                                              Thorn'Tooth can i plz argue with you?

                                          • Hoani Borrie
                                            Hoani Borrie  1 days back

                                            This video was published on my birthday, and it's about diseases.

                                            Oh Dear...

                                            • Hanna Weronika Kaczanowska

                                              Anti vaxers: vaccines cause addiction to heroin! Studies show that vaccinated children are 90% more likely to use heroin!
                                              Me: that’s because they live long enough to find out what it is

                                              • irina lmao
                                                irina lmao  1 days back

                                                It insane that people are being brainwashed by all of this nonsense. Your just mad that my child will be hellthy forever😚

                                                • Corey Playz
                                                  Corey Playz  2 hours back

                                                  Lol ok

                                                • irina lmao
                                                  irina lmao  4 hours back

                                                  Or Im just bad at making people angry

                                                • irina lmao
                                                  irina lmao  4 hours back

                                                  Im just joking, since there were no comments about triggered ati-vaxers I wanted to make one myself just to see how people would respond. You guys are weirdly calm

                                                • Corey Playz
                                                  Corey Playz  13 hours back

                                                  Hellthy? XD Yes, they will be goign through living hell

                                                • Adrian Vera
                                                  Adrian Vera  15 hours back

                                                  dahbul ki oh ok

                                              • Clorox Bleach
                                                Clorox Bleach  1 days back

                                                News: Vaccined man killed by father for getting vaccinate

                                                Anti-vaxxers: THIS MUST MEAN VACCINES CAUSE AUTISM, HOMOSEXUALITY, AND EVEN MORE DISEASES.

                                                • Isaac Simpson
                                                  Isaac Simpson  1 days back

                                                  I'm believe in vaccine and everyone should get them but don't you guys think the immune system we get weak if we rely on vaccinations?

                                                  • Adrian Vera
                                                    Adrian Vera  1 days back

                                                    Isaac Simpson no. Vaccines create memory cells, memory cells are part of the immune system. Memory cells help the immune system to identify any harmful bacteria or viruses

                                                • Ady Wijaya
                                                  Ady Wijaya  1 days back

                                                  Anti vaxxers

                                                  What time to be alive

                                                  • 1987 Ferrari F40
                                                    1987 Ferrari F40  20 hours back

                                                    @irina lmao found the libtard

                                                  • Ady Wijaya
                                                    Ady Wijaya  1 days back

                                                    @irina lmao nothing wrong with all of them. They just had one thing in common.

                                                  • Adrian Vera
                                                    Adrian Vera  1 days back

                                                    irina lmao nothing wrong with them its just that like a vegan, most of them tend to make a big deal out of those that eat meat and feminists who get offended over little things

                                                  • irina lmao
                                                    irina lmao  1 days back

                                                    Whats wronh with feminists??
                                                    Whats wrong with trans people??
                                                    Whats wrong with vegans??
                                                    You seem like you dont belong in the 21st century..

                                                • Badnametag
                                                  Badnametag  1 days back

                                                  Vaccines don’t cause autism-
                                                  Karen: *BUT DO THEY?*

                                                  • Brunson III Films
                                                    Brunson III Films  2 days back

                                                    This was an excellent video bravo to your team 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻

                                                    • syzシーズ
                                                      syzシーズ  2 days back

                                                      잘못된 정보를 전파하는 동영상.

                                                      • Addison Higbe
                                                        Addison Higbe  2 days back

                                                        society vary extra

                                                        • Annouk
                                                          Annouk  2 days back

                                                          My boyfriend is anti vax :(

                                                        • Dan Torrino
                                                          Dan Torrino  2 days back

                                                          You can't fix stupid

                                                        • E-Dern Chew
                                                          E-Dern Chew  2 days back

                                                          6:19 UNDERTALE REFERENCE

                                                          "Here's a better question for you.
                                                          D O Y O U W A N T T O H A V E A B A D T I M E ?"

                                                          • E-Dern Chew
                                                            E-Dern Chew  2 days back

                                                            Also 2 weeks is about the time it takes to finally get past sans.

                                                        • Beanie_boos _are_best
                                                          Beanie_boos _are_best  2 days back

                                                          Can't wait untill an antivaxxer has an unvaxxed baby that has autism

                                                          • Rhys Dooley
                                                            Rhys Dooley  2 hours back

                                                            They'll blame the father and go gay

                                                          • Sanctus Baal
                                                            Sanctus Baal  1 days back

                                                            The Grim Reaper: they allredy had...

                                                        • Kiran Rajpurohit
                                                          Kiran Rajpurohit  2 days back

                                                          One doubt I had. Why did nature put these monsters in the first place if they were meant to be eradicated? 😯

                                                          • awesome guy 21
                                                            awesome guy 21  2 days back

                                                            What do you mean ”meant to be eradicated”? A virus is a living being that lives for the same readon you do. They just happen to exist to live inside our bodies.

                                                          • Pixelart Animations
                                                            Pixelart Animations  2 days back

                                                            Kiran Rajpurohit because nature is nature. It sucks

                                                        • Raylo
                                                          Raylo  2 days back

                                                          it sucks that this video has 7.8K dislikes, like... what is there to even dislike about this, please tell me, if you disliked this video... Why?

                                                        • NardyNite 251891419812314

                                                          7.8 k antivaxxers

                                                          • chooba chia
                                                            chooba chia  2 days back

                                                            hear that, karen?

                                                            • epic memer boi
                                                              epic memer boi  2 days back

                                                              i think the future curer of cancer was already born, but now is dead because the mom was an anti-vaxxer

                                                              • Peanut butter and Jellyfish

                                                                Just a curiosity, if we get immunization from getting sick, why do I need to get booster shots every year/ couple of years?

                                                                • Vary Olla
                                                                  Vary Olla  2 days back

                                                                  As Richard noted there are different reasons.  Sometimes as noted the pathogen mutates.  Also it depends on the type of vaccine.  As an example the Tetanus vaccine is what is known as a toxoid vaccine.  That is because Tetanus is caused by a bacteria which releases a toxin into your bloodstream = and it is the toxin that causes cellular damage.  So the vaccine imparts temporary immunity against the toxin - but you must get booster shots every 10 years as that immunity wanes for your average person after 10-20 years.

                                                                  It also can depend upon how "strong" your body reacts to the antigen.  As an example.  The Pertussis bacteria is a nasty one which can trigger a harsh reaction in the body.  So the old Pertussis vaccine was what is referred to as "whole cell" = meaning it used the entire bacteria.  Accordingly it also used to sometimes trigger harsh side effects in susceptible people - although it generally imparted good immunity response. 

                                                                  Some years back however we saw the development of an "acellular" Pertussis vaccine - or recombinant DNA technology.  Now a "piece" of something can still trigger immunity while not resulting in as harsh side effects = making it better tolerated by all.  The downside however if you will is that the immunity it precipitated does not necessarily last as long as the older whole cell vaccine version.

                                                                  So vaccination science is as much a "tradeoff" as it is about science.  Some pathogens are harsher on the body than others and thus impart immunity which lasts longer than others.  Meanwhile we sometimes opt for a vaccine which can be tolerated better by all over an older one = even if that means the immunity does not last as long.  It just depends.  Have a nice day.

                                                                • Richard Gregory
                                                                  Richard Gregory  2 days back

                                                                  Because not all infections (or vaccinations) result in lifelong immunity. Norovirus, for example: your immunity only lasts for 3-6 months. Lifelong immunity can also weaken even if it remains. And lastly, you have to have flu shots every year because the virus rapidly mutates and whlst you remain immune to the old one, you have noprotection against the new version. That is also why there is no vaccine against the common cold: there are just too many viruses and they change too rapidly. It is an example of the eternal war between the immune system and viruses.

                                                              • Ithiltor Kingslayer
                                                                Ithiltor Kingslayer  2 days back

                                                                the fact this has 7.8k dislikes is just straight up sad

                                                                • AetherResonant
                                                                  AetherResonant  3 days back

                                                                  *our memory cells are just our immune system's weaponized vietnam flashbacks*