Scientists are struggling to monitor an active volcano that erupted off the South Pacific island of Tonga at the weekend, after the explosion destroyed its sea-level crater and drowned its mass, obscuring it from satellites.

The eruption of Hunga-Tonga-Hunga-Ha’apai volcano, …

China on Monday canceled plans to sell tickets to the public for the Winter Olympics in Beijing, as the number of COVID-19 cases in the country reached its highest point since March 2020.

Organizers said last year there would be …

On a cold winter afternoon in the Indian capital, New Delhi, a group of auto rickshaw drivers huddled outside a metro station hoping to pick up passengers. Since the city shut schools, colleges, restaurants and offices to cope with a …

U.S. health officials on Friday encouraged more Americans to wear the kind of N95 or KN95 masks used by health care workers to slow the spread of the coronavirus.

Those kinds of masks are considered better at filtering the air. …

There’s more evidence that one of the world’s most common viruses may set some people on the path to developing multiple sclerosis.

Multiple sclerosis is a potentially disabling disease that occurs when immune system cells mistakenly attack the protective coating …

A new Hong Kong mandate that restaurants and other establishments require use of an app aimed at recording people’s locations and telling them if they have been near a COVID-19 patient has spurred opposition from the city’s pro-democracy voices.

The …

U.S. President Joe Biden sympathized with coronavirus-weary Americans Thursday while ramping up the government’s effort to combat the surge of the omicron variant across the country.

“I know we’re all frustrated as we begin the new year,” Biden said in …