pandemic

During the pandemic scientists launched a vaccine in record-breaking time. Their successful use of mRNA technology could lead to progress in the decades-long effort for an HIV inoculation.

Whether it's a wedding, graduation or meeting, indoor events can spread the virus. Here's a complete guide: what to ponder before going, how to cut risks while there, what to do if cases crop up.

New versions of omicron are circulating in the United States and South Africa. Two new studies shed light on the potential for future surges — and the risk factor if you've already had omicron.

Vaccinations and residual immunity are among the reasons, President Biden's chief medical adviser, Anthony Fauci, said Tuesday, as the number of deaths drop and hospitalizations rise only slightly.

In China, for example, not only are masks required on planes but gloves are recommended — and passengers are urged not to touch their face during the flight. Here's what you'll find around the globe.

With COVID case counts falling and rising, testing is critical. But how many days after exposure should I test? And if I have symptoms but test negative, might the test not be accurate?

The variants — BA.2.12.1 and BA2.12.2 — have been detected in New York and other states as well as 5 other countries. One has a mutation that seems to give it an edge in evading the immune system.

My 6-year-old has been exposed to SARS-CoV-2 at least four times and never tested positive. Many people fall into that category. Researchers have theories about why they've been able to ward it off.

China's lockdown and quarantine policy is testing the limits of the city of 26 million. Parents were separated from kids. And there's not enough staff for the elderly residents of care centers.

Cases are surging in some regions but dropping in many places. If you're in the latter situation, is it OK to go back to living as you did pre-pandemic? Print our handy zine with advice from experts.

Battling its biggest COVID surge in two years, Shanghai has instituted rigorous lockdowns — again — that are frustrating residents.

The government is struggling to bring all 3 million-plus students back to schools that were shuttered when the pandemic hit. Teachers are ready to resume classes. But obstacles loom.