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Serological, or antibody, tests can indicate whether a person has had Covid-19, even if they were asymptomatic.

Testing has become a sore subject for Trump and his administration, which is struggling to ramp up availability as states across the country begin to reopen for business.

The 2020 election season heats up Tuesday with the first competitive House special elections since the pandemic began.

Virgin Group founder Sir Richard Branson is preparing to sell up to $504.5 million of his stake in space tourism company Virgin Galactic.

"Certainly, there have been some reported cases of putative relapse, so, people who have fallen sick again," said Dr. Mike Ryan, executive director of the WHO's emergencies program.

Several countries that have lifted coronavirus restrictions and reopened businesses have seen jumps in coronavirus cases, underscoring the "challenges that may lie ahead," the World Health Organization warned Monday.

Some executives expressed cautious optimism on earnings calls, suggesting that things were starting to look up in April after an alarming drop-off in March. But all warned that it will be a long slog before their businesses return to normal.

Coronavirus inflammatory syndrome in children is causing heart and kidney failure, New York City Health Commissioner Dr. Oxiris Barbot said Monday.

Treasury yields were flat on Monday as investors weighed attempts to reopen economies against fears of an increase in coronavirus cases that could lead to future lockdowns.

House Democrats are working to finalize their next bill to combat the coronavirus pandemic, which could include state and local relief.

Shanghai Disney reopened Monday, making it the first major theme park to do so since being forced to close by the coronavirus pandemic.

BioAegis Therapeutics is currently awaiting FDA approval to begin testing its plasma gelsolin therapy on Covid-19 patients. The company says its treatment prevents the damage caused by excess inflammation without suppressing the immune system and offers the best defense against the virus.

Arguments over whether Trump may shield his tax records from state and congressional investigators will be broadcast live because of coronavirus. Here's how to follow along.

Now that office-based companies have invested in remote work tools, there's no returning to the old world of crowded conference rooms.

Jonathan Kravis's criticism of the Justice Department and William Barr came after the department took steps to benefit Roger Stone and Michael Flynn, who are allies of President Donald Trump.

White House advisor Peter Navarro on Monday threatened retaliation against China for its role in the spread of the coronavirus pandemic as tensions between the world's two largest economies continue to rise.

Abbott plans to ship nearly 30 million tests this month and will have the capacity to ship 60 million tests in June.

WHO is holding a briefing on the Covid-19 pandemic.

Paul Tudor Jones said Wall Street could be witnessing the historic "birthing of a store of value" through bitcoin.