Research and basic information on subjects ranging from tuberculosis surveillance to adolescent health disappeared from federal health agency websites.

Michael R. Bloomberg, the former New York City mayor and a public health advocate, is asking Senate Republicans to persuade President-elect Donald J. Trump to “rethink” Kennedy’s nomination.

An emboldened fringe of right-wing “manosphere” influencers has seized on Donald Trump’s presidential win to justify and amplify misogynistic derision and threats online.