David Geier has been hired as a senior data analyst at H.H.S. According to several people, he will examine any potential links between vaccines and autism that were debunked long ago.

The showdown catapults the interstate abortion wars to a new level.

The layoffs are part of a major restructuring at the health department, which now employs about 80,000 people.

The best-selling author chatted with The Times’s global health reporter about the past, present and troubling future of the world’s deadliest infectious disease.

Health Secretary Robert F. Kennedy Jr. has called them poison, but doctors say prescription stimulants like Ritalin and Adderall help millions of people.

State health officials worry that declining vaccination rates have left many communities vulnerable nationwide.

Federal officials cited the end of the Covid-19 pandemic in halting the research. But much of the work was focused on preventing outbreaks of other pathogens.

States were told Monday that they could no longer use grants that were funding infectious disease management and addiction services.

A 281-page spreadsheet obtained by The Times lists the Trump administration’s plans for thousands of foreign aid programs.

Dr. Jay Bhattacharya gained prominence during the pandemic as an opponent of widespread lockdowns.

After the health secretary promoted vitamin A as a cure, parents in West Texas began giving their children high doses, sometimes to prevent infection.

A religious organization recruited him to help open New York City’s first independent abortion clinic, though it was unaware that Louisiana had taken away his license.

Public health leaders are horrified by Robert F. Kennedy Jr.’s approach to measles, but government and industry are responding to him.