A presentation by scientists on a work group for the Centers for Disease Control and Prevention’s vaccine advisory panel highlighted various alleged “safety uncertainties” of the mRNA COVID-19 vaccines, including those about cancer and changes to the immune system. Scientists, however, told us that many of the cited studies are either misconstrued or of poor quality.
SciCheck
FactCheck.org’s SciCheck feature focuses exclusively on false and misleading scientific claims that are made by partisans to influence public policy. It was launched in January 2015 with a grant from the Stanton Foundation. The foundation was founded by the late Frank Stanton, president of CBS for 25 years, from 1946 to 1971.
Trump Officials Cite Dubious Estimates of Medication Abortion Harms
As justification for a Food and Drug Administration review of a drug used in medication abortion, two Trump administration health officials have referenced an April report from an anti-abortion group that claims to show a far higher rate of serious side effects from the drug than has been found previously. However, the report, which is not peer-reviewed research, didn’t disclose where it got its data and has substantial methodological issues, reproductive health experts say.
RFK Jr.’s Inaccurate Claims About Tylenol, Circumcision and Autism
Health and Human Services Secretary Robert F. Kennedy Jr. further added to the Trump administration’s problematic claims about Tylenol and autism on Oct. 9, alleging during a Cabinet meeting that circumcision-related studies provide evidence that the drug causes the condition when given to children. The studies, however, do no such thing.
RFK Jr. Misleads About Antidepressants and School Shootings
A day after a shooting at a school in Minnesota, Health and Human Services Secretary Robert F. Kennedy Jr. claimed, as he has before, that certain antidepressant drugs, known as SSRIs, “might be contributing to violence” in such cases. Experts say there is no direct evidence linking SSRIs to mass shootings. He also falsely claimed SSRIs have black box warnings for homicidal ideation.
Q&A on the 2025-2026 COVID-19 Vaccines
Vaccine Advisory Committee Members Mislead About COVID-19 Vaccination During Pregnancy
A substantial body of evidence supports the safety of the COVID-19 vaccines during pregnancy, contrary to the suggestions of some members of the Centers for Disease Control and Prevention’s vaccine advisory committee. Health and Human Services Secretary Robert F. Kennedy Jr. recently reconstituted the committee.
Q&A on Changes to Recommendations for Combined MMR and Chickenpox Vaccine
On Sept. 18, the vaccine advisory committee for the Centers for Disease Control and Prevention voted to change its recommendation on the combined vaccine for chickenpox and measles, mumps and rubella, called the MMRV vaccine. We spoke to experts about claims made at the meeting as well as the implications of the vote.
Trump Misleads on Climate Change and Renewables at U.N.
The Facts Behind Claims on Autism, Tylenol and Folate
News reports have indicated Health and Human Services Secretary Robert F. Kennedy Jr. may point to Tylenol and folate deficiency in his promised announcement on the causes of autism. But neither Tylenol nor folate deficiency has been shown to cause autism. Some evidence has pointed away from Tylenol as a risk factor.
COVID Vaccines Are Harder to Get, Despite Claims from HHS, RFK Jr.
Heated exchanges between some senators and Health and Human Services Secretary Robert F. Kennedy Jr. during a Sept. 4 hearing amplified confusion about the availability of COVID-19 vaccinations for the fall, with Kennedy misleadingly claiming that “anybody” can still get a vaccine. HHS policies have created roadblocks to vaccine access.









