A Trump administration spokesman says Washington will continue to engage the rest of the world in vaccine development but won't be "constrained" by the "corrupt" World Health Organization.

The World Health Organization's Tedros Adhanom Ghebreyesus says he fears that without global cooperation ensuring equal access to COVID-19 vaccines, some countries could resort to hoarding.

Vaccine candidates are in advanced clinical trials, and WHO's director-general expresses hope they will be effective. But until then, he said, the world is reliant on "the basics" of disease control.

Researchers say airborne transmission is possible, especially in cramped indoor settings, but it's unclear how much it contributes to the spread. Here's how to lower your risks, just in case.

In a letter to the U.N., the president said the United States will terminate its relationship with the World Health Organization effective July 6, 2021. He was met with a barrage of criticism.