State Department Permits Distribution of H.I.V. Medications to Resume — for Now

The Trump administration on Tuesday issued a waiver for lifesaving medicines and medical services, offering a reprieve for a worldwide H.I.V. treatment program that was halted last week. The waiver,…

‘This Is a Dangerous Virus’

When bird flu first struck dairy cattle a year ago, it seemed possible that it might affect a few isolated herds and disappear as quickly as it had appeared. Instead,…