A look at the eyebrow-raising antics and scientifically dubious assertions of the federal government's number one science skeptic

U.S. Health Secretary Robert F. Kennedy Jr.'s changes to vaccine policy have led medical organizations and states to create their own vaccine guidelines, worried that preventive shots for healthy children and pregnant women may become inaccessible.

Decades of research show the mercury-containing preservative thimerosal is safe in vaccines, but CDC's new advisory panel is raising concerns about its safety.

RFK Jr’s newly appointed vaccine panel votes to restrict thimerosal in flu shots, reviving decades-old controversy over a preservative widely deemed safe by scientists and global health agencies.

The health secretary has made many inaccurate statements about vaccines. But the science is clear that vaccines have dramatically reduced childhood illness, disability and death.

RFK Jr.'s picks for CDC vaccine advisers meet this week amid controversy. An influential committee that helps craft federal vaccine policy and recommendations for the Centers for Disease Control ...

FILE - Robert Kennedy Jr., center, President-elect Donald Trump's pick to lead the Health and Human Services Department, walks between meetings with senators on Capitol Hill, Tuesday, Dec. 17 ...

When RFK Jr. announced he would cut funds from Gavi, the Vaccine Alliance, he cited "vaccine safety," referring to a 2017 study from Guinea-Bissau. We asked vaccine researchers to assess the study.