COVID-19

COVID-19 Vaccines Can Make Periods Longer, Study Says

Menstrual cycles do tend to get longer after COVID-19 vaccination—though the change is minimal and temporary.

What We Know So Far About BA.2.75.2, the 'Most Resistant' Variant to Date

The latest version of the COVID-19 virus can evade current vaccines and treatments.

Pfizer-BioNTech Seeks to Expand Omicron Booster to 5- to 11-Year-Olds

Pfizer asked U.S. regulators to expand use of its updated COVID-19 booster shot, which targets Omicron subvariants, to kids ages 5 to 11.

Human Waste Could Help the Fight Against Future Infectious Disease Outbreaks

Why You Should Rest—a Lot—If You Have COVID-19

It could help prevent Long COVID

Hong Kong Ends Hotel Quarantine for Arrivals

The move is being welcomed locally, but will it be enough to bring travelers back?

A New Coronavirus Found in Bats is Resistant to Vaccines

The virus was found in a population of bats in Russia

Here’s How Effective the Original Vaccines Are Against Omicron

A study quantifies how well the original vaccines and boosters work against the Omicron variant

I’ve Had COVID-19. Do I Still Need the Omicron Booster?

Many people have had COVID-19 by now, but they should still get an Omicron booster

China Quarantine Bus Crash Prompts Outcry Over 'Zero COVID'

A nighttime bus crash that killed 27 people in southwest China this week has set off a storm of anger online over the harshness of the country's strict COVID-19 policies