In an op-ed, experts say the case for boosters for healthy younger adults is not strong, and those shots would do more good elsewhere

More than half the country's population is expected to face potentially life-threatening food insecurity this winter

The traveler, who recently returned from South Africa, was fully vaccinated and has "mild symptoms that are improving," said the CDC.

Although the United States and China have entered an era of strategic competition, cooperation on health security is more important than ever