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Antibody tests can identify people who have been previously exposed to the coronavirus. But false positive results are a concern. Performing two different tests could reduce errors.

In his letter threatening to withdraw the U.S. from the World Health Organization and halt all funding, Trump made a number of charges about WHO's handling of the coronavirus crisis.

Researchers culled through more than 200 million tweets discussing the virus since January and found that about 45% were sent by accounts that behave more like computerized robots than humans.

Nursing home experts say priorities need to change, emphasizing quality of life over profits. The stunning COVID-19 death toll brings scrutiny to an industry that many believe is due for an overhaul.

Colleges might be able to reopen their campuses if they're able to frequently test their students. But can they get tests --- and with budgets already squeezed, will they be able to afford it?

What's the risk of contracting the virus through the eyes? And in what situations would protective eyewear be helpful?

Writing letters to strangers in almost all 50 states became an outlet to process anxieties about the pandemic. And a reminder of all the ways we are connected.

The pandemic's disruption of international labor and transportation sectors has made it harder to produce and transport illegal drugs and to send profits back across national borders.

"If that rule had gone into effect, then every hospital, every nursing home would essentially have to have a plan," said David Michaels, former Occupational Safety and Health Administration chief.

More than 100,000 Americans die from COVID-19. China moves closer to criminalizing dissent from Hong Kong. And, violent protests continue in Minneapolis after a black man died in police custody.