Proposed new rules would pull all federal financing from hospitals that continue to provide gender treatments for adolescents.Health Secretary Robert F. Kennedy Jr., with President Trump and Mehmet Oz, the Medicaid and Medicare services administrator, in the White House in September.

Familial feuds have ripple effects, experts say.

The American Heart Association report runs contrary to recent studies — and the group’s own guidelines — that found any amount of alcohol to be harmful.While there is no dispute that heavy drinking is harmful to health, the question before experts is whether light to moderate drinking provides more protection from cardiovascular disease than not drinking at all.

The city and surrounding region have some of the highest levels of flu-like illness in the United States.The flu shot may not be as effective this year as in some other years.

For ecologists, the Covid-19 pandemic has presented a remarkable natural experiment in what can happen to wild animals when humans stay home.Dark-eyed juncos, normally forest-dwelling, have occupied Los Angeles for about 20 years.