Dozens of deaths and hundreds of infections are suspected, an African agency said. Health experts were alarmed that the outbreak hadn’t been announced sooner.

They were passengers on a plane to Johannesburg with an infected Dutch woman who later died.

The virus is clearly far less contagious than the coronavirus, scientists agree, but they have found cases where it spread among people without direct contact.

A study of a few patients, to be presented this week, showed promise for a type of therapy that has already cured some blood cancers.

The Trump administration has slashed funding for infectious disease research and has far fewer employees, including disease detectives, to respond to outbreaks.