How Monkeypox Went From Containable to Crisis

In mid-June, cases of monkeypox were in the double digits in the United States. There were drug treatments and vaccines against it. There didn’t seem to be any reason for alarm. But in the weeks since, the virus has spread rapidly across the country, with some local and state officials declaring public health emergencies. Guest: Apoorva Mandavilli, a science and global health reporter for The New York Times.