The Science of Anti-Vaccination

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Fewer children in the United States are getting vaccinated. That’s bad news for those kids, and also for public health in general. Often, the response is to argue and debate and get angry at people who are we see as making terrible, irrational decisions. Instead of doing that, let’s use science to understand why this is happening in the first place.

Hosted by: Hank Green
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Meta-Analysis of the Safety of Vaccines: http://pediatrics.aappublications.org/content/134/2/325
The Internet and the Psychology of Vaccination Decisions: http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=19849
Naturalness Bias: http://www.ncbi.nlm.nih.gov/pubmed/18319507
Omission Bias and Vaccines: http://mdm.sagepub.com/content/14/2/118
Difficulty in changing minds once they’re made: http://pediatrics.aappublications.org/content/early/2014/02/25/peds.2013-2365
Onset Patterns of Autism: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2857525/
Bad is Stronger than Good - Negativity Bias: http://assets.csom.umn.edu/assets/71516.pdf
Parental Vaccine Decision Making: http://www.ncbi.nlm.nih.gov/pubmed/24011751
Read more about Risk Perception: https://en.wikipedia.org/wiki/Risk_perception
And Explanatory Style: https://en.wikipedia.org/wiki/Explanatory_style

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Tags :

vaccines vaccinations anti-vaxxers autism autism spectrum disorder psychology social psychology cognitive psychology cognitive bias negativity bias confirmation bias explanatory attribution pattern recognition risk perception cognition science hank green sci show Vaccine Controversies Vaccination (Field Of Study) Vaccine (Drug Class)

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    Popular Comments:

Paul Quinn . 2019-06-16
Take away the ability to sue then they will make them safe. Now just big chemical experiment because there are no safety studies.
121 2 . Reply
Paul Quinn . 2019-06-16
Vaccines make most sense. 1in 35. Epidemic moron
121 2 . Reply
the dunno A.K.A finyshed . 2019-06-15
It’s not science. It’s looking on a random blog titled “secrets doctors don’t want you to know”
121 2 . Reply
Matantsa . 2019-06-15
Anti vax moms are right dont vax ur kids because You can’t get autism if your dead
121 2 . Reply
Matantsa . 2019-06-15
Pro Vaccination research: Expert scientist that have PhDs

Anti-vaxxers research: SoME *M*Omz PoST iNg SOme BS sTUff
121 2 . Reply
Alvin P . 2019-06-15
My grandmother got vaccinated by Imperial Japanese doctors when they occupied my country back in world war 2, she's now 81.

Goddamn even fascist Japanese doctors are more sensible than these people
121 2 . Reply
william C . 2019-06-15
Anti VAX parent - why is my 2 year old boy crying?
Doctor - He's having a midlife crisis!
121 2 . Reply
Antonio Usai . 2019-06-15
Considering that this is a video about "The Science of Anti-Vaccination" I consider it quite long.

0 Seconds would have been enough to list their arguments.
121 2 . Reply
netcoms197 . 2019-06-15
vaccines kill and disable childre: only child abusers and victims of abuse promoote vaccines
121 2 . Reply
Hossein Ghanaati . 2019-06-15
folks if you agree plz vote for this to make sure hank sees this:
hey Hank.
it would be great if you could produce a series for explaining all of the different kinds of biases and fallacies etc. maybe as a follow up on your philosophy crash course or something. and also including all of the ways that data can be manipulated through statistics, p hacking or anything else. there are some videos out there about all these but it is very useful and important if we could have a reference for all of them, explained by someone who can do it well.
121 2 . Reply
David Richards . 2019-06-15
Medicine is given out like candy you can easily go into a doctors surgery say your depressed and the doctor will readily give you an antidepressant, which can cause a wide range of side effects nausea,weight gain, loss of sexual desire, fatigue and drowsiness, insomnia, dry mouth, blurred vision, constipation, dizziness, agitation, irritability, anxiety and I'm sure there are other possible side effects. One medical professional that had a good handle on disease was Hippocrates he said Let food be thy medicine and medicine be thy food, find a doctor who understands and practices this understanding then you have found a good doctor who potentially understands modern medicine.
We have always used medicine of some kind even in more primitive times when we were hunter gatherers they discovered that such things as certain herbs when eaten eased various conditions. My wife was given a pill for high cholesterol, she developed rash she went back to the doctor he gave her another pill, the first day she developed pain in her right leg after a time it cleared up, the next day she took another pill and developed crippling pain in that leg again so painful she couldn’t walk and her left leg started to swell needless to say when the pain cleared up she didn’t take another pill and pain didn’t come back. These drugs would have been thoroughly tested and approved for use. The only thing that the doctor said to my wife that made sense was that, if that last pill he gave her didn’t work, she will have to go onto a strict diet. The very thing I had been trying to explain to her, let food be thy medicine. Most drugs and vaccines should used as a last cause of action and not the first.
121 2 . Reply
Leaf Boi . 2019-06-15
Time to get the Ouija board!
121 2 . Reply
Rebecca Brown . 2019-06-15
The vaccinated are herd contaminators. It's a FACT. Check it out if you're brave enough.
121 2 . Reply
Gianni Libero . 2019-06-15
7:53 "It turns out, people are complicated..." -Hank Green
121 2 . Reply
Kayla Garcia . 2019-06-14
I would like to see the data instead of just believing that vaccines don't cause autism. My child had a bad experience with his last set of vaccines and he became autistic. We have been detoxing the heavy metals and whatever else they put in them won't go to far into it. He is becoming his self again. I think fear causes people to think vaccines work when I believe they are spreading more decease then good.
121 2 . Reply
Bugxar . 2019-06-14
What if anti vaxxers are secretly other countries trying to trick us into not vaccinating so we all die
121 2 . Reply
David Richards . 2019-06-14
We evolved from the smallest of nature’s living creatures, cell by cell, forged from billions of years of evolutionary processes. And now we insert chemicals into our bodies’, chemicals which nature rejected from our biological structure, because these chemicals do not, support our biological structure. These chemicals are used for that very reason, because when used these chemicals assert a force, which insinuates a reaction, but like much of our technologies such as the burning of fossil fuels and the production of plastics, it causes collateral damage, which continues to grow. And I have to say despite our often remarkable achievements, when it comes to our willingness to be subjugated by big Pharma, We have definitely taken a step back in the evolutionary scale. Our politicians have been mesmerized, by a belief that vaccines are some kind of wonder drug, and sadly, they lack the fortitude and courage, to look beyond their convictions, and take control of a concern, that is out of their control. And as such any opposition to this realization angers them, because they cannot accept they are wrong in their approach to these drugs, maybe because to admit being wrong, is to admit to being human.
When Chemicals that don't naturally reside in the human body, (supporting the Bodies structure and normal functions) are inserted into the body, with the expectation of causing a reaction, and do cause damage even as simple as a rash, (a clear indicator of damage) then the probability of further damage, is, and should be expected as a possibility, not expecting or accepting this prospect, is naive at best, and is, without doubt, a flawed premise. Genes are the "Blue Prints", and not switches, genes cause problems when influenced by environmental factors.
121 2 . Reply
Justin With a fake.y . 2019-06-13
1980 doctors: we did it boys we stopped small pox.
anti-vax parents in 2019: oh. i dont think so
121 2 . Reply
Banks Shah . 2019-06-13
4,202 fools, including JT and JB
121 2 . Reply
Bread . 2019-06-13
the science?
You mean irrelevant and outright wrong anecdotes?
121 2 . Reply
Issa George . 2019-06-13
I am a health care professional now but while in college I wanted to find out how common viruses work and how to treat them using natural therapies. My diet changed every year while in college and in 2014 I stopped eating dairy and gluten and I stopped eating foods that come in packages and I cook my own foods now. I don't get cold/cough/flu anymore and it been years since I had these viruses. In my first year of college I was eating pizza rolls, bread, pop tart, tv dinners, and other junk food and I got sick twice that year. I know for sure dairy products cause mucus if I eat them everyday because the mucus comes just after 4 freaking days. Without dairy I get zero mucus forever.
121 2 . Reply
Leon Dy . 2019-06-13
I don't think worrying about anti-vaxxers is worth the time. It's just the way natural selection works, less stupid people means it's a better world for the rest of the inhabitants.
121 2 . Reply
Kathryn Smith . 2019-06-13
Its June '2019 - Epidemic of Typhoid Fever, TB, Heptitis outbreak in Los Angeles, Calif. Measles, mumps outbreaks continue to spread, more cases higher than 1960s. Caused by unvaccinated adults, parents not vaccinating their kids. That's sad & tragic the kids, teens, adults who have been disabled, harmed by those preventable diseases. If only they had gotten the vaccines...
121 2 . Reply
Alices's House . 2019-06-13
Measles was a normal childhood illness, I never heard of anyone dying from it, it was no big deal for me. When did it turn into a deadly epidemic? .....When profits and money was involved.
121 2 . Reply
Alices's House . 2019-06-13
SciShow, you disappoint me.
121 2 . Reply
Alices's House . 2019-06-13
just type in vaccine fraud and do the reading... then you might be singing a different tune.
Not tested for safety, that's why! - vaccines are safe, but the adjuvant added has never been tested and is not proven to be safe.
US National Library of Medicine:
"Currently, ethylmercury (EtHg) and adjuvant-Al are the dominating interventional exposures encountered by fetuses, newborns, and infants due to immunization with Thimerosal-containing vaccines (TCVs). Despite their long use as active agents of medicines and fungicides, the safety levels of these substances have never been determined, either for animals or for adult humans—much less for fetuses, ..."
121 2 . Reply
MsE . 2019-06-12
When sudden stop of development happens. It just happens? There is a cause.
Gut health is so important and injecting so many things at once into anyone's body and bypassing the gut altogether is BAD. I hope and pray the truth is exposed sooner rather than later. This is mainstream brainwashing, think for yourself.
121 2 . Reply
Ken Worth . 2019-06-12
Blacks should not get vaccinated.
Vaccines are being used as a form of biological warfare... with minority groups, especially blacks, being the targets.


Go to timestamp 22:30 on the video I've shared to hear about Vaccines.
121 2 . Reply
Madi Unknown . 2019-06-12
As an Autistic person, I am so tired of my brain being used as a scare tactic
121 2 . Reply
GECKman88 . 2019-06-12
I think these parents who are against vaccination need to speak to someone who is autistic, not a child, but an adult. They will realise that like a lot of other mental, or even physical problems, it can be overcome. To the point that almost no one knows or would guess that I am autistic IRL. Friends, girlfriends, workmates, they all think I'm normal or just intelligent. Then if I tell them I am Autistic, they are shocked, as if to them it's not possible for someone like me to function.
121 2 . Reply
ADC91802 [GD] . 2019-06-11
You know what I don't understand? These anti vax parents would rather listen to the news of not vaccinating (fake news) on google and facebook than a doctor who is obviously pro vax and has been to college, medical school, and residency.
121 2 . Reply
Richard Deegan . 2019-06-11
“Vaccines” do not cause autism? How many vaccines actually have studies related to autism? Only one, that is the MMR. How can you say For sure vaccines (plural) do not cause autism when there is NO science to back up your claim. It’s hilarious when you state science but it’s actually your lack of science that shows Your Ignorance.
121 2 . Reply
Al Sajan . 2019-06-11
My best friend and cousin got polio from the polio vaccine. But the fact that vaccines contain known toxins doesn't matter. This is the best cognitive dissonance video I have ever seen. Truly dangerous backlighting people who have actually experienced vaccine damage. Shame on you.
121 2 . Reply
Ivy Gregory . 2019-06-11
Anti vac: this is my son billy
Germs/deadly elements:it’s free Real estate
121 2 . Reply
Anon . 2019-06-11
what about underlying mitochondrial disorders and vaccines, such as in the case of Hannah Polling? Where Dr. Zimmerman stated that the mitochondrial disorder (genetic) was triggered by vaccines (environment).
121 2 . Reply
eCharleen . 2019-06-10
"Must consume and obey..."
121 2 . Reply
RakiArtsFX . 2019-06-10
dumb parent: i wont vaccinate my child
kid: dies at age 3
dumb parent: its cause of science
121 2 . Reply
Lacey Raye . 2019-06-10
What are the odds vaccines aren’t associated with autism when: #1 A senior government scientist blew the whistle on CDC fraudulently omitting data on a MMR/Autism study. (https://www.c-span.org/video/?c4546421/rep-bill-posey-calling-investigation-cdcs-mmr-reasearch-fraud). #2 A government expert in the Omnibus Autism Proceeding, Dr. Zimmerman, claims the government covered up his true expert opinion on vaccines and autism. (http://fullmeasure.news/news/cover-story/the-vaccination-debate?fbclid=IwAR2_k55U-fxqnJUqP6cXnypRNyVGJcHg3VRcHIEN8eH7I6Ybi7AmEouo4gg) #3 Massive amount of consumers are claiming their children regressed into autism after vaccines. (https://www.youtube.com/channel/UCFCrfK5rP_B6huriP1hLApw)
121 2 . Reply
Alternate Man . 2019-06-10
From the generation that doesn’t know what sex they are - lol
121 2 . Reply
Joey Mooney . 2019-06-10
Hard to take a video seriously when every single comment is a troll or a meme.
121 2 . Reply
Omega Ox . 2019-06-09
Just looking for triggered anti vaxx people in the comments......dont mind me
121 2 . Reply
JLEmmanuel Antiporda . 2019-06-09
i figured it out the anti vaxers are the ones causing autism not the vaccines
121 2 . Reply
Michael Mason . 2019-06-09
A giant man eating squirrel scares the crap out o me.
121 2 . Reply
George C. . 2019-06-09
9:15 mins of pure BS
121 2 . Reply
M M . 2019-06-08
The choice to not vaccinate is a health care choice and we have always had freedom of choice in health care. It is being taken away ( is that acceptable to you ?) because a huge corporation needs to increase revenue and the last thing they care about is you because they do not even know your name or face.

Vaccinated people are learning the hard way. I just wish they didn't have to but big pharma and their buddy main stream media have convinced them to roll up their sleeve and get that shot of carcinogen, virus and animal and human DNA. These will be the same people eager to receive the HIV/AIDS vaccine when it comes out, mandatory for all adults. It will be good, they'll think, to have HIV/AIDS injected into me, even though I am not high-risk, sure, vaccines are the healthiest things for my body. They are not going to care one bit what you say, just tell you it's mandatory and roll up your sleeve. If you get sick, disabled or die, they will say it was not the vaccine.

Don't learn the hard way. Healthy Adults 2020 is right around the corner. Why do you think that there are all these phony outbreak deceitful reports now ? They want you to get used to being so utterly scared that you'll readily get their deadly synthetic product shot up into you. Think about it. It's going to be worse with the mandated adult vaccines . Trust me, or not.
121 2 . Reply
Xiloe Teknowledgies LLC . 2019-06-08
This video be like "Ergo, questioning the safety of vaccines is BAD, y'all!"
121 2 . Reply
Xiloe Teknowledgies LLC . 2019-06-08
5:01 "... and the safety of vaccines is called into question."
121 2 . Reply
Andrea Mendenhall . 2019-06-08
All comments below made by 18-22 year olds with no children.
121 2 . Reply
01101100 01101001 01100111 01101000 01110100 . 2019-06-08
Its a risk-benefit analysis. Everybody should decide for themself 

For your information , some of the side effects that might occur just from one vaccine

taken from a National Vaccine Support Group :
Some rare side effects from a MMR vaccine:  

Febrile seizures (high fevers causing a seizure) are estimated to occur in 1 in every 3,000 children who get the MMR vaccine.

Approximately 1 out of 30,000 children could develop a temporary low platelet count, which could cause bruising or bleeding under the skin.

Fewer than one in 1 million children have a serious allergic reaction (anaphylaxis) within a few hours of receiving the vaccine. Symptoms may include breathing problems, wheezing, hives, and a skin rash.

MMR vaccines are associated with reports of children who developed deafness, long-term seizure disorders, coma, lowered consciousness,

 or permanent brain damage. 

Seek medical attention immediately if you notice unusual behavior changes.

The following is a list of side effects that have been reported in patients who received a MMR vaccine, but so rarely that it is unknown if they were actually caused by the vaccine:

Acute disseminated encephalomyelitis (ADEM)
Allergic reaction
Atypical measles
Bronchial spasm


Diabetes mellitus
Ear infection (otitis meida)
Erythema multiforme
Facial swelling
Febrile seizures (high fever causing seizure)
Guillain-Barré Syndrome (GBS)
Lymphadenopathy (enlarged lymph nodes)
Measles inclusion body encephalitis (MIBE)
Neurological disorders
Ocular palsies
Optic neuritis
Pneumonia and pneumonitis
Rash (measles-like rash)
Shoulder Injury Related to Vaccine Administration (SIRVA)
Sore throat
Stevens-Johnson Syndrome (SJS)
Syncope (fainting)
Subacute sclerosing panencephalitis (SSPE)
Transverse myelitis
121 2 . Reply
anke j . 2019-06-07
I wish those people would think twice and take action.
I have 2 kids with an immune disease.
of course they where vaccinated, but no doctor can guarantee that they really are immune to the illnesses we vaccinated them for.
so the more people who are vaccinated, the less likely my kids will encounter one of those horrifying diseases. (this keeps me up at night.)
121 2 . Reply