WHO

The World Health Organization advisory group will include scientists from the U.S., China and two dozen other countries and will study various hypotheses, including the possibility of a lab leak.

The WHO has given the green light to the first malaria vaccine. Thousands of people are afflicted by malaria every year in sub Saharan Africa. Young children are especially vulnerable to the disease.

Cuba has started selling its COVID-19 vaccines abroad. It insists its trials show they're safe and effective — so why hasn't the World Health Organization said so too?

The World Health Organization says last week’s drop of about 400,000 cases marked the first substantial decline in more than two months, with decreases in every world region.

The international scientists dispatched to China by WHO to look for the origins of the coronavirus say the search has “stalled” and warn the window for getting to the bottom of the mystery is closing fast.

If all goes to plan, Americans who got Pfizer or Moderna shots can get a third dose eight months after their last jab. Here's why health officials think you'll need one.

Public health figures believe a focus on boosters for the already vaccinated will hasten the emergence of new variants among the billions of unvaccinated people — including a vaccine-resistant strain.

The organization's director is calling for a ban on boosters for at least two months to reach his target of getting 10% of the population in every country vaccinated by Sept. 30.

Cases of the variant have popped up in several states. But neither the WHO nor the CDC considers it a variant of concern, and the fast-spreading delta variant continues to dominate U.S. cases.

Chinese officials say they cannot support a second phase of a study into the origins of the pandemic, including new investigation into the theory that the virus might have leaked from a Chinese lab.