Americans are advised to wear masks but President Trump says he won't.
Anyone who comes into contact with the president must take a Covid-19 test first.
President Trump said the US Centers for Disease Control (CDC) had recommended that face coverings should be worn in public to help prevent the spread of Covid-19 - but added that he would not be wearing one.
Ventilators will be taken from certain New York hospitals and redistributed to the worst-hit parts of the state under an order to be signed by Governor Andrew Cuomo.
New York saw its highest single-day increase in deaths, up by 562 to 2,935 - nearly half of all virus-related US deaths recorded yesterday.
The White House may advise those in virus hotspots to wear face coverings in public to help stem the spread.
The US now has 245,658 Covid-19 cases.
A shortage of several hundred ventilators in New York City, the epicentre of the outbreak in the US, prompted Mr Cuomo to say that he will order the machines be taken from various parts of the state and give them to harder-hit areas.
Amid a deepening crisis, top health official Dr Anthony Fauci has said he believes all states should issue stay-at-home orders.
"I don't understand why that's not happening," Dr Fauci told CNN on Thursday. "If you look at what's going on in this country, I just don't understand why we're not doing that."
The US is continuing to work on better testing, particularly with the goal of a finger-prick test that can determine if somebody has already had the virus or is asymptomatic.
As many Americans lose their health insurance along with their jobs, many questions regarding how the federal government will cover costs for individuals and businesses remain unanswered, despite Mr Trump's assurances that the administration is responding well and help is coming.
"You've got to put your foot on the accelerator to bring that number down," he added, referring to infection and death rates.