The presumptive Democratic presidential nominee said every governor should mandate mask-wearing as a way to prevent the spread of COVID-19.

If you want to socialize with family or friends — say share a vacation cabin — can testing in advance keep everyone safe? We asked experts how diagnostic tests work and how to interpret the results.

The results are in from a Nobel prize winner's landmark study of a deworming program. He finds the impact is immense. But the idea still gets mixed reviews

While most people who die from COVID-19 are over 65, health care workers who die are often younger. Here are stories of some who died in their 20s, leaving shattered dreams and devastated families.

Four new likely cases of COVID-19 are linked to a cluster in an Auckland family announced Tuesday. The country returns to tighter restrictions and is promoting an app to help with contact tracing.

President Trump has directed the Treasury Department to stop collecting payroll taxes this fall in an effort to boost workers' paychecks. But the move is temporary, and could spark headaches in 2021.

The state offers support and resources for people isolating because of COVID-19 — helping them make choices that keep everyone safe. It's work more states need to fund, experts say.

It's the first country to approve a COVID-19 vaccine, but it has not finished Phase III trials to assess safety and effectiveness in the general population.

In Harris County, Texas, about 25% of people are "absolutely unwilling to share anything," says a local health department epidemiologist. Misinformation is one reason for the mistrust, officials say.

Federal and state eviction bans, put in place during the pandemic, have lapsed. President Trump's executive order to prevent evictions isn't enough and Congress needs to act, housing activists say.