Notorious anti-vaccine advocate David Geier has begun working at the US Department of Health and Human Services and is seeking access to sensitive vaccine safety data that the Centers for Disease Control and Prevention had previously barred him from accessing—at least twice—according to reporting from The Wall Street Journal.

Geier and his father, Mark Geier, who died in March, are known for peddling the thoroughly debunked falsehood that vaccines cause autism, publishing a long list of dubious articles in low-quality journals that push the idea. In particular, the two have blamed the mercury-containing vaccine preservative, thimerosal, despite numerous studies finding no link. Thimerosal was largely abandoned from vaccine formulations in 2001 out of an abundance of caution.

In 2011, an investigation by the Maryland State Board of Physicians found that the Geiers were misdiagnosing autistic children and treating them with potent hormone therapies in a treatment they dubbed the "Lupron Protocol." Mark Geier was stripped of his medical license. David Geier, who has no medical or scientific background and holds only a bachelor's degree, was disciplined for practicing medicine without a license.

The disciplinary action didn't stop health secretary and fellow anti-vaccine advocate Robert F. Kennedy Jr. from hiring David Geier to the health department this year. His employment was initially reported in March by The Washington Post. At the time, reporting indicated that Geier would be involved in leading a federal study on vaccines and autism.

"I was out there wearing a press card around my neck, a big camera around my neck as well," he told the BBC

"There is clear evidence that the senate results are incorrect, and there are statistical indications that the presidential results are highly unlikely," Lulu Friesdat, founder and executive director of SMART Legislation, said in a statement.