Sumathi Reddy

Hyper-infectiousness and low disease severity convince some that the danger has diminished. Health experts say risks remain.

Popular cloth masks may not offer enough protection against the fast-spreading variant, doctors say. Here’s what you need to know about stronger options.

At-home rapid antigen tests are in demand to help us assess risk during the current surge in Covid-19 infections. But recent studies raise questions about how effective the tests are at detecting the Omicron variant.

Some scientists say the nose-only approach is missing early infections, but the FDA warns against throat swabbing.

How long should you quarantine, who should you tell, and when should you call your doctor? Here are answers to your questions.

Scientists studying the Covid-19 variant are homing in on how quickly it spreads.

Some Covid-19 patients continue to experience symptoms such as buzzing sensations and shaking months after their initial diagnosis. Their cases are gaining more attention among long Covid advocates and some doctors.

Doctors say no vaccine is 100% effective, but they add that the extra dose still offers crucial protection.

Three weeks is the recommended interval between the first two doses of Pfizer’s Covid-19 vaccine in the U.S., and four weeks for Moderna. But a longer wait could provide more protection, studies suggest.

With Thanksgiving gatherings and travel ahead for many, there are science-backed answers for when to time the shot for optimal protection.