A US naval ship with 1,000 hospital beds has arrived in New York to provide relief to overwhelmed hospitals.
Emergency medical centres have been set up across the country.
President Donald Trump, who has been criticised for downplaying the crisis, said the number of cases would not reach its peak for another two weeks.
The pandemic has become a major political issue.
Can the US prevent the crisis from spiralling out of control?
Aljazeera