While the spread of new coronavirus cases is steady or slowing in many parts of the world, it is accelerating in the Western Hemisphere, where new case reports rose by 20 percent in the past week, the World Health Organization warned on Wednesday. North America, where new case reports areContinue Reading

In early 2021, scientists in Colombia discovered a worrisome new coronavirus variant. This variant, eventually known as Mu, had several troubling mutations that experts believed could help it evade the immune system’s defenses. Over the following months, Mu spread swiftly in Colombia, fueling a new surge of Covid-19 cases. ByContinue Reading

BERLIN — Four months ago, Austria made headlines when it announced plans to become the first Western democracy to impose a general vaccine mandate to fight the coronavirus, a measure that would have hit adults who refused to be inoculated with fines of up to 3,600 euros (about $4,000). ThatContinue Reading

The complications Saliva also has trade-offs. While the virus appears to build up in saliva early, the nose may be a better place to detect it later in the course of infection. Researchers at the California Institute of Technology found that while the virus often spiked first in saliva, itContinue Reading

India is expanding its Covid vaccination drive to include everyone 15 or older and making health workers and some older citizens eligible for booster shots, as the country grapples with the prospect of another wave fueled by the Omicron variant. Prime Minister Narendra Modi, in an address to the nationContinue Reading

New Zealand said on Tuesday that it was pushing back a phased opening of its borders to the end of February, in another indication of how countries throughout the Asia Pacific region are scrambling to respond to the threat of the Omicron variant. New Zealand also postponed its plans toContinue Reading

The good news, experts said, is that America has resources at its disposal, if it chooses to use them. Tests still work for Omicron. Vaccines are now widely available and could blunt the burden of severe disease. Antiviral pills, which are expected to be effective against Omicron, could soon beContinue Reading

With the rise of Delta and Omicron variants, and as the virus surges across the world, cruise lines have been adjusting their health and safety protocols, reinstating measures like mask mandates and requiring additional testing from passengers. Starting Jan. 13, Disney Cruise Line will require all children over the ageContinue Reading

Seek and you shall find In any other context, it would have been unremarkable: On Sunday, Nov. 28, a San Francisco resident who had been feeling mildly ill took a Covid test. The next day, it came back positive. What set off alarm bells, however, was that the resident hadContinue Reading

Public health authorities in Denmark and Norway on Monday released grim projections for the coming wave of the Omicron coronavirus variant, predicting that it will dominate both countries in a matter of days. Although scientists don’t yet know how often the variant causes severe disease, they say its rapid rateContinue Reading