Michelle Fay Cortez Bloomberg

Five people are on board a submersible vessel that has gone missing in the North Atlantic during an expedition to the Titanic shipwreck.

After more than three years, the global Covid emergency is officially over.

The tsunami of Covid-19 that's taking hold across China is spurring concern that a dangerous new virus variant could emerge for the first time in more than a year, just as genetic sequencing to catch such a threat is dwindling.

The tsunami of Covid-19 that's taking hold across China is spurring concern that a dangerous new variant could emerge for the first time in more than a year, just as genetic sequencing to catch such a threat is dwindling.

The disclosure of new Covid variants emerging in China and the rise of a potentially more transmissible strain in the U.K. has recast the spotlight on the ongoing risk of the virus, even as health experts say there's no reason to panic.

An unsung arm of the immune system appears to protect against severe disease with the omicron variant even when antibodies wane, helping to explain why a record wave of infections hasn't engulfed hospitals so far.

Singapore is hitting Covid-19 case levels not seen since the early days of the outbreak, putting the city-state's recent pledge to slowly open up and live with the virus to the test.

As Covid-19 surged last year, governments worldwide touted the hope of "herd immunity," a promised land where the virus stopped spreading exponentially because enough people were protected against it. That's now looking like a fantasy.

Faced with a limited supply of shots and anxious populations waiting their turn, more countries are turning to an initially controversial strategy that's now been vindicated by scientific studies: doubling or tripling the intervals between the first

The coronavirus wave that plunged India into the world's biggest health crisis has the potential to worsen in the coming weeks, with some research models projecting that the death toll could more than double from current levels.

Two weeks ago, Prime Minister Narendra Modi called on states to only consider lockdowns "as the last option."

Sinovac Biotech Ltd.'s coronavirus vaccine cut in half the risk of developing symptomatic Covid-19 in a key Brazilian study, suggesting two doses of the shot is less potent than some other immunizations designed to tame the ongoing pandemic.

British doctors who spent 102 days treating a cancer survivor for Covid-19 documented how the virus mutated after the man was treated with convalescent plasma.

More Americans have received at least one dose of a Covid-19 vaccine than have tested positive for the virus, an early but hopeful milestone in the race to end the pandemic.

AstraZeneca Plc stopped giving shots of its experimental coronavirus vaccine after a person participating in one of the company's studies got sick, a potential adverse reaction that could delay or derail efforts to speed an immunization against Covid-19.

Five people are on board a submersible vessel that has gone missing in the North Atlantic during an expedition to the Titanic shipwreck.

After more than three years, the global Covid emergency is officially over.

The tsunami of Covid-19 that's taking hold across China is spurring concern that a dangerous new virus variant could emerge for the first time in more than a year, just as genetic sequencing to catch such a threat is dwindling.

The tsunami of Covid-19 that's taking hold across China is spurring concern that a dangerous new variant could emerge for the first time in more than a year, just as genetic sequencing to catch such a threat is dwindling.

The disclosure of new Covid variants emerging in China and the rise of a potentially more transmissible strain in the U.K. has recast the spotlight on the ongoing risk of the virus, even as health experts say there's no reason to panic.

An unsung arm of the immune system appears to protect against severe disease with the omicron variant even when antibodies wane, helping to explain why a record wave of infections hasn't engulfed hospitals so far.

Singapore is hitting Covid-19 case levels not seen since the early days of the outbreak, putting the city-state's recent pledge to slowly open up and live with the virus to the test.

As Covid-19 surged last year, governments worldwide touted the hope of "herd immunity," a promised land where the virus stopped spreading exponentially because enough people were protected against it. That's now looking like a fantasy.

Faced with a limited supply of shots and anxious populations waiting their turn, more countries are turning to an initially controversial strategy that's now been vindicated by scientific studies: doubling or tripling the intervals between the first

The coronavirus wave that plunged India into the world's biggest health crisis has the potential to worsen in the coming weeks, with some research models projecting that the death toll could more than double from current levels.

Two weeks ago, Prime Minister Narendra Modi called on states to only consider lockdowns "as the last option."

Sinovac Biotech Ltd.'s coronavirus vaccine cut in half the risk of developing symptomatic Covid-19 in a key Brazilian study, suggesting two doses of the shot is less potent than some other immunizations designed to tame the ongoing pandemic.

British doctors who spent 102 days treating a cancer survivor for Covid-19 documented how the virus mutated after the man was treated with convalescent plasma.

More Americans have received at least one dose of a Covid-19 vaccine than have tested positive for the virus, an early but hopeful milestone in the race to end the pandemic.

AstraZeneca Plc stopped giving shots of its experimental coronavirus vaccine after a person participating in one of the company's studies got sick, a potential adverse reaction that could delay or derail efforts to speed an immunization against Covid-19.