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 • 73 152

  • 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!

  • Luke Phillips
    Luke Phillips  57 minutes back

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

    • Ayden Racco
      Ayden Racco  3 hours back

      This needs to be shown and shared everywhere

      • Jazz Santana
        Jazz Santana  3 hours back

        You could make a great Pixar movie with those memory cells

        • Evanston Conner
          Evanston Conner  7 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  8 hours back

            antivaxer:vaxines have a DANGEROUS SIDE EFFECT

            Me:yeh the side effect is ANTI VAX SHAAAAME

            • Terrifying Blaze
              Terrifying Blaze  8 hours back

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

          • Carl Heffner
            Carl Heffner  8 hours back

            Karen: still has sideffects so i will never use it

            • Elbereth Varda
              Elbereth Varda  10 hours 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  11 hours 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  12 hours 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 😗)

                  • Hoani Borrie
                    Hoani Borrie  16 hours 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  16 hours back

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

                        • Adrian Vera
                          Adrian Vera  11 minutes back

                          dahbul ki wait what?

                        • dahbul ki
                          dahbul ki  20 minutes back

                          the fact that you can't spell healthy makes me wonder if I should trust you on if vaccines are safe or not.

                        • Adrian Vera
                          Adrian Vera  15 hours back

                          irina lmao wait for being vaccinated or not being vaccinated?

                      • Clorox Bleach
                        Clorox Bleach  17 hours back

                        News: Vaccined man killed by father for getting vaccinate


                        • Isaac Simpson
                          Isaac Simpson  17 hours 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  15 hours 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  19 hours back

                          Anti vaxxers

                          What time to be alive

                          • 1987 Ferrari F40
                            1987 Ferrari F40  3 hours back

                            @irina lmao found the libtard

                          • Ady Wijaya
                            Ady Wijaya  15 hours back

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

                          • Adrian Vera
                            Adrian Vera  15 hours 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  16 hours 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  19 hours back

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

                          • Brunson III Films
                            Brunson III Films  23 hours back

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

                            • syzシーズ
                              syzシーズ  1 days back

                              잘못된 정보를 전파하는 동영상.

                              • Addison Higbe
                                Addison Higbe  1 days back

                                society vary extra

                                • Annouk
                                  Annouk  1 days back

                                  My boyfriend is anti vax :(

                                • Dan Torrino
                                  Dan Torrino  1 days back

                                  You can't fix stupid

                                • E-Dern Chew
                                  E-Dern Chew  1 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  1 days back

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

                                • Beanie_boos _are_best
                                  Beanie_boos _are_best  1 days back

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

                                  • Sanctus Baal
                                    Sanctus Baal  8 hours back

                                    The Grim Reaper: they allredy had...

                                • Kiran Rajpurohit
                                  Kiran Rajpurohit  1 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  1 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  1 days back

                                    Kiran Rajpurohit because nature is nature. It sucks

                                • Raylo
                                  Raylo  1 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?

                                  • Adrian Vera
                                    Adrian Vera  15 hours back

                                    Raylo cause they cant handle the truth

                                • 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  2 days back

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

                                          • earth you are here
                                            earth you are here  2 days back

                                            please kill viruses

                                            • MacroManiaPlays
                                              MacroManiaPlays  2 days back

                                              Vaccines cause adults

                                            • DownEpic
                                              DownEpic  2 days back

                                              A side affect is not getting diseases

                                              • Lucian
                                                Lucian  2 days back

                                                I chose be an autistic rather than dead

                                                • Janet Donald
                                                  Janet Donald  2 days back

                                                  No you've watched this, watch the film on YouTube called Vaxxed.

                                                  • Lets do gaming Boyyy
                                                    Lets do gaming Boyyy  2 days back

                                                    I knew it

                                                    • LittleFlyingAnimationMV's

                                                      0:10 I was positive he would say "The internet is full of complete idiots".

                                                      • mimi lili
                                                        mimi lili  3 days back

                                                        the researchers studied a sample of 1,100 healthy children and young adults in Rochester, as well as over 1,000 participants from the U.S. Naval Health Research Center in San Diego as the control group. The Navy members, aged 18 to 40, were all healthy and recently vaccinated, and represented a cross-section of ethnic groups. The study also looked at a subset of a recent immigrant population from Somalia in Rochester. The Minnesota case studies were done in cooperation with the Rochester Epidemiology Project.

                                                        "The significance of the findings is that in the future we may be able to create vaccines for specific groups or even individuals based on their genomic and other characteristics," says Dr. Poland. "That may mean adjusting doses for some or being able to treat larger populations with the same vaccine if the dosage is less."

                                                        if you are a refugee you are more vulnerable to be experimented on !!!!!!!!! be aware of these rats.

                                                        • mimi lili
                                                          mimi lili  10 minutes back

                                                          @Zhanna Reich wow you really are stupid right because your trash are not in my mother land ?

                                                        • Zhanna Reich
                                                          Zhanna Reich  23 hours back

                                                          Refugees free to go back since there are no military conflicts in somalia and such.

                                                      • James Wall
                                                        James Wall  3 days back

                                                        No one noticed that at 4:54, they showed the MCU as the developed world? In the Comics the MCU is Earth 199999. And you can see the help arrived and stark tower if you look closely.

                                                        • Mr. Duck
                                                          Mr. Duck  3 days back

                                                          7800 anti-vaxxers disliked this

                                                          • Tucher97
                                                            Tucher97  3 days back

                                                            side effects of vaccines, improved immune system
                                                            downside, the list is smaller than a gnat's penis or smaller than a unvaccinated child's life expentency any longer then that luck should be used with the lottery

                                                            • Adrian Vera
                                                              Adrian Vera  2 days back

                                                              Tucher97 thx

                                                            • Tucher97
                                                              Tucher97  2 days back

                                                              @Adrian Vera I will try and keep it in mind, remember that if that doesnt work then some people are down right ignorant and indirectly admit it

                                                            • Adrian Vera
                                                              Adrian Vera  2 days back

                                                              Tucher97 ok

                                                            • Adrian Vera
                                                              Adrian Vera  2 days back

                                                              Tucher97 if you can find comments with the name “micheal lucas” youll know what im dealing with

                                                            • Tucher97
                                                              Tucher97  2 days back

                                                              @Adrian Vera ask them what prevents a grocery store clerk that sells food that only makes you sick

                                                          • roblox games
                                                            roblox games  3 days back

                                                            and why didn't you explain a bit more about pneumonia? edit:same with encephalitis

                                                            • roblox games
                                                              roblox games  3 days back

                                                              in the thought experience, what happened to the other 2% you didn't mention?

                                                              • Reni Corlatesla
                                                                Reni Corlatesla  2 days back

                                                                They don't get infected
                                                                But I'm not sure so just take it as a possibility

                                                            • Lady Birds
                                                              Lady Birds  3 days back


                                                              • Cyboy Gaming
                                                                Cyboy Gaming  3 days back

                                                                Humans: *Creates vaccines*
                                                                Universe: Sorry. Too OP. Gonna have to nerf this.
                                                                Universe: *Creates anti vax people*
                                                                Humans: Excuse me what the fuck

                                                                • Adrian Vera
                                                                  Adrian Vera  2 days back

                                                                  Trying to deal with the worst antivaxxer

                                                                • Cyboy Gaming
                                                                  Cyboy Gaming  2 days back

                                                                  Adrian Vera *And what would that problem be good sir/madam?*

                                                                • Adrian Vera
                                                                  Adrian Vera  3 days back

                                                                  Cyboy Gaming i have a problem

                                                              • Axale
                                                                Axale  3 days back

                                                                I swear i was about to go on a killing spree when i saw that title

                                                                • Adrian Vera
                                                                  Adrian Vera  2 days back

                                                                  Axale what are you gonna do?

                                                                • Adrian Vera
                                                                  Adrian Vera  2 days back

                                                                  Axale idk

                                                                • Axale
                                                                  Axale  2 days back

                                                                  @Adrian Vera Why am i hearing a final boss battle theme all of a sudden ?

                                                                • Adrian Vera
                                                                  Adrian Vera  2 days back

                                                                  Axale yeah. Im gonna make a man out of him

                                                                • Axale
                                                                  Axale  2 days back

                                                                  @Adrian Vera Understandable but arguing with them will leade to nothing they are just SO FUCKING STUBORN.