Four new states have imposed sweeping stay-at-home directives in response to the coronavirus pandemic, putting over 80 per cent of Americans under lockdown as the number of deaths in the United States nearly doubled in three days.

The governors of Florida, Georgia, Mississippi and Nevada each instituted the strict policies on a day when the death toll from COVID-19 shot up by 925 to more than 4,800 nationwide, with 214,000 confirmed cases, according to a Reuters tally.

President Donald Trump said he saw no need for the federal government to issue a nationwide decree, with 39 states and the District of Columbia now requiring residents to stay home except for essential outings to the doctor or grocery store.

Read full Reuters story here.