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Peter Attia MD#159-Peter Hotez MD, PhD.: The anti-vaccine movement, causes of autism, & COVID-19 vaccine update
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CHAPTERS
- 0:02 – 10:30
Why Anti-Vaccine Beliefs Persist After Wakefield
Peter Attia asks why roughly 20% of Americans still link vaccines and autism after Wakefield was debunked. Hotez says the anti-vaccine movement keeps shifting its claims and has become politicized and more complicated as an ecosystem.
- •Hotez describes the movement moving the goalposts from MMR to thimerosal, vaccine spacing, aluminum and chronic illness
- •Around 2014-2015 the movement attached itself to the Republican Tea Party and the 'health freedom' framing
- •Hotez names national groups and local PACs, some linked to far-right extremism
- •Attia says the goal is to help confused parents rather than stop the movement
- •The Lancet paper retraction and Brian Deer's reporting are discussed
- 10:30 – 19:46
Thimerosal: What It Was and Why It Was Removed
Hotez explains that thimerosal was a preservative for multi-dose vials and has largely been removed. He covers how the mercury concern arose, the difference between ethylmercury and methylmercury, and why large studies found no link to autism.
- •Thimerosal prevented bacterial growth in multi-dose vials and was taken out of childhood vaccines because of publicity, not evidence of harm
- •Hotez says Robert F. Kennedy Jr. likely drew a link to Minamata disease
- •Minamata involved methylmercury, which differs from the ethylmercury in thimerosal
- •Autism rates did not fall after removal
- •Hotez says anti-vaccine groups respond to refuting studies by alleging payoffs from pharma
- 19:46 – 24:01
Vaccine Spacing, 'Antigen Overload' and the Schedule
Hotez describes the 'too many vaccines at once' hypothesis and the push for alternative schedules, arguing they lack scientific basis. Attia presses on parents' concerns, using hep B as an example, and Hotez explains how the schedule was developed.
- •Hotez says autism brain imaging does not show inflammation, so the antigen-overload idea made no sense to him
- •Alternative schedules lack trial data and could affect immunogenicity or cause interference
- •The standard schedule was developed through FDA and CDC review processes
- •Attia asks whether infants really need hep B vaccine
- •Hotez calls the hep B recombinant vaccine low risk with a strong safety record
- 24:01 – 31:58
The Hib Vaccine: A Personal Example of Vaccine Impact
Hotez recounts treating Haemophilus influenzae type b meningitis as a house officer and the fear of bringing it home. He describes the conjugate vaccine that made the disease disappear in infants.
- •Hib meningitis frequently led to permanent neurologic injury or death in infants
- •The older capsule vaccine did not work in infants
- •Conjugating the capsule to protein produced a vaccine licensed in 1989 that worked in infants
- •Hotez took rifampicin prophylaxis, which turned his urine orange
- •Within a few years he taught Hib only for historical interest
- 31:58 – 42:02
The HPV Vaccine and Its Controversies
Attia and Hotez discuss the HPV vaccine as a cancer-prevention tool and the controversies around it. Hotez cites Australia's elimination effort, US access gaps, and anti-vaccine claims about autoimmunity and infertility.
- •About 16% of cancers have infectious causes, and Australia aims to eliminate cervical cancer by 2030
- •Vaccination at ages nine to ten, before sexual debut, was hard for some parents to accept
- •Attia frames the choice as an asymmetric risk bet for parents
- •Hotez says there is no evidence for claims of infertility, miscarriage or autoimmunity
- •Head and neck cancers linked to HPV are also discussed
- 42:02 – 47:28
Why Vaccines Draw Such Intense Opposition
Attia asks why vaccines attract far more ire than antibiotics or insulin. Hotez points to prevention in healthy people, school mandates, regressive autism, and an internet and social media environment that amplifies anti-vaccine content.
- •Hotez notes that vaccines are given to well people, unlike treatments for the sick
- •School entry mandates create a sense of lost choice
- •Regressive autism gives anti-vaccine groups an opening
- •Anti-compulsory vaccination leagues existed in the 1900s
- •Hotez says the internet, social media and Amazon now push mostly anti-vaccine information
- 47:28 – 56:58
From Health Freedom to an Anti-Science Political Movement
Hotez traces how California's exemption changes after the Orange County measles outbreak led the movement to rebrand as health freedom. He says it spread through Texas PACs, then into opposition to masks and public health measures, with attacks on scientists and Russian involvement.
- •Texas PACs and the Tea Party made vaccine skepticism a platform issue
- •The movement shifted to anti-mask and anti-distancing activity and spread to Europe
- •Hotez says US and British intelligence describe Russian 'weaponized health communication'
- •Hotez describes Fox News hosts attacking vaccines and him personally
- •Attia asks whether this represents the whole Republican Party and Hotez says he cannot say but that it is more pervasive than ever
- 56:58 – 59:36
Vaccine Hesitancy Among Republicans and African Americans
Hotez cites polls showing white Republicans as the most vaccine-hesitant group, with African American hesitancy initially similar but now declining. He discusses clergy outreach, Tuskegee's legacy and deliberate targeting by anti-vaccine groups.
- •Polls from PBS/NPR/Marist, Texas A&M and Kaiser found white Republicans or Trump voters most hesitant
- •African American hesitancy has come down, which Hotez attributes partly to outreach and clergy networks
- •Hotez cites structural racism and Tuskegee, and also deliberate targeting by the anti-vaccine lobby
- •Hotez describes a new 'documentary' linking COVID vaccines to Tuskegee
- 59:36 – 1:07:40
Targeted Measles Outbreaks and Hotez's Role as a Scientist Speaking Out
The discussion turns to measles outbreaks in Minnesota's Somali community and Orthodox Jewish communities in New York. Hotez then explains why he called out the White House disinformation campaign, the personal toll, and his bipartisan background.
- •Measles, with a reproductive number of 12 to 18, reappears as soon as vaccination coverage falls
- •Coverage in the Somali community in Minnesota fell from over 90% to 40%, according to Hotez's account of Washington Post reporting
- •Anti-vaccine groups targeted Orthodox Jewish groups and Harlem communities
- •Hotez says his wife encouraged him to speak out and that it was a lonely, dark experience
- •Hotez says he has criticized both the Trump and Biden administrations
- 1:07:40 – 1:09:11
Historical Precedent for Distrust of Science
Attia asks whether there has been a historical precedent for such distrust of science. Hotez gives the example of Cotton Mather and smallpox but says he has not seen this systematic distrust and targeting of scientists before.
- •Hotez cites the firebombing of Cotton Mather's window over smallpox inoculation
- •He sees no earlier precedent for systematic, mainstreamed anti-science
- •The internet, social media and Amazon amplify the damage
- 1:09:11 – 1:20:00
Rachel's Autism and the Genetic Basis of Autism
Attia asks Hotez about his daughter Rachel's early years and diagnosis. Hotez explains why he never found a vaccine cause plausible, citing brain imaging and the roughly 100 genes tied to early fetal brain development, including the gene found in Rachel.
- •Rachel was diagnosed around 19 months at the Yale Child Study Center
- •Brain volume changes visible in infancy precede the regression parents often link to vaccination
- •About 100 autism-linked genes act in early fetal brain development, and Rachel has a neuronal spectrin mutation
- •Hotez says the Wakefield claim never made biological sense to him
- •He describes Rachel's profound intellectual disability and his worry about her future care
- 1:20:00 – 1:41:31
Diagnosing Autism and Whether Incidence Is Rising
Hotez and Attia discuss how autism is diagnosed, the role of the DSM and exome sequencing, and the debate over neurodiversity. They then discuss whether true incidence is increasing, with an Alzheimer's comparison, genetic versus epigenetic influences, and heritability.
- •Diagnosis relies on DSM criteria, which Hotez calls rudimentary, especially for girls
- •Girls are underdiagnosed and the boy-to-girl ratio is moving from 10:1 toward 3:1 or lower
- •Whole exome sequencing finds a mutation in only about 30-40% of cases
- •Hotez says genes are the dominant factor, with possible epigenetic influences in pregnancy
- •Hotez has seen no evidence of a true rise in incidence, while Attia assumed a modest real increase
- 1:41:31 – 1:57:31
Comparing COVID-19 Vaccines and the Variants
Attia moves to current COVID topics, starting with the adolescent vaccine data and the different vaccines. Hotez uses slides to explain the B.1.1.7 spike mutation and the South African and Brazilian variants, and discusses boosters and the AstraZeneca clotting concerns.
- •Pfizer's adolescent data showed high antibody titers but only small case numbers
- •Hotez expects boosters for all vaccines and says all the vaccines are good
- •The B.1.1.7 variant has a spike substitution that strengthens binding to ACE2 but remains neutralized by vaccine antibodies
- •The South African and Brazilian variants carry a second change that lowers neutralizing antibody titers
- •Reports of cerebral venous thrombosis have hurt perception of the AstraZeneca vaccine
- 1:57:31 – 2:08:58
Global Vaccine Access and Vaccine Diplomacy
Hotez explains why mRNA vaccines cannot supply the roughly four billion doses needed for Africa and Latin America. He describes his team's yeast-based recombinant protein vaccine, funding from donors, and the case for local vaccine production and vaccine diplomacy.
- •mRNA scale-up and freezer requirements limit supply to Africa and Latin America
- •Hotez's recombinant protein vaccine in yeast could be produced at 100 million doses a month
- •Donors including Tito's Vodka and the Kleberg Foundation funded the work after his earlier podcast
- •COVAX was well designed but lacked enough vaccine supply
- •Hotez argues for building vaccine production capacity in Africa and Latin America
