The U.S. now has the highest coronavirus death toll in the world, with more than 20,000, and President Donald Trump is now left to make what he calls "the biggest decision of his life" -- when to reopen the country.

Coronavirus cases in the country are starting to level out in some places.

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"This gives us great heart that not only in specific places, but we're starting to see that change,” says Dr. Deborah Birx, with the U.S. Coronavirus Task Force.

Despite that, America's top health experts say people can't be complacent.

"This is not the time to feel that since we have made such important advances in the sense of success in mitigation that we need to be pulling back at all,” says Dr. Anthony Fauci, with the U.S. Coronavirus Task Force.

The big question on the minds of many Americans is whether home quarantine will extend into May if President Trump's health advisers recommend it.

"I'm going to make a decision based on a lot of different opinions, some will maybe disagree, and I'd love to see it where they don't disagree,” says President Trump. “Will there be risks? There's always going to be a risk that something can flare up."

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A big part of getting America’s gears grinding again is antibody testing.

"Very soon we will have an antibody test that Americans will be able to take to determine whether they had the coronavirus," says Vice President Mike Pence.

With fears of another eruption of infections, some states are extending emergency declarations and stay-at-home-orders.

"We are in total control of our destiny here,” says New York Gov. Andrew Cuomo. “What we do will affect literally life and death for hundreds of people."