Trade policies haven’t helped. Tariffs on medical supplies made them more expensive, and they were only lifted March 5, even though health care associations asked the administration last year to exempt items like masks, gloves and gowns. And now countries including South Korea, India and Taiwan are blocking exports of medical supplies to save them for their own citizens, leaving the U.S. with fewer options.

South Asia appears to have been less hard hit than elsewhere in the world but the rate of new infections in Pakistan, India and Sri Lanka is accelerating with the total across South Asia passing 800. Seven people have died.

Officials worry that these countries could prove especially in danger due to poor health facilities and infrastructure in much of the region. The virus has already infected more than 245,000 people worldwide and killed more than 10,000.

The total number of confirmed cases in mainland China stood at 81,008 at the end of Friday, the health authority said. The death toll was 3,255, up by seven, a much slower rate than at the height of the crisis.

The lack of locally transmitted cases for the third day running underscored a recovery that has prompted officials to relax restrictions, even in the virus epicentre of Wuhan, which was responsible for all seven new deaths.

The pandemic that has swept the globe has also shattered lifestyles across much of the United States in the past week, shuttering schools and businesses, prompting millions to work from home, forcing many out of jobs and curtailing travel.