As the number of cases outside Africa approaches 800, governments are scrambling for a limited pool of vaccines and treatments with unclear effectiveness.
The United States has stockpiled millions of doses of two smallpox vaccines, also effective against monkeypox. But the outbreaks so far are clustered in other countries.
Supermarkets stocked up as long lines formed. The Chinese authorities ordered mass testing to contain a rising number of coronavirus cases in an affluent district of the capital.