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Doctors say the machine that helps some people with sleep apnea keep their airway open at night won't be enough to help an ill COVID-19 patient breathe and could spread the coronavirus to bystanders.

Public health officials are concerned about increasing polarization among Americans over vaccines.

Among his new steps to fight COVID surges this winter: requiring private health insurers to reimburse people for at-home tests. It also calls for more people to get vaccines and boosters.

Millions of people in the U.S. have lost someone they love to COVID-19, and advocates hope to have those losses marked each year on the first Monday in March.

The Biden administration says Americans will be able to order COVID-19 tests online starting Wednesday. Those who are eligible can get eight free over-the-counter at-home tests a month.

As the world enters the pandemic's 3rd year, some ask whether the 70% vaccination goal set by WHO and the Biden administration could in fact be detrimental. Also: See our map of global progress.

"It's just crazy," Welsh cyclist Geraint Thomas said at the Tour de Suisse on Friday, after around 30 riders were forced to abandon the race.

The isolated East Asian country has only stated how many people have fevers daily, and has only identified a few of the cases as COVID-19 since admitting to an outbreak of the omicron variant.

Hungarian-born biochemist Katalin Karikó and American immunologist Drew Weissman found that a chemical change to genetic code called mRNA eliminated a problematic side effect when used in vaccines.

The chances of developing lingering symptoms after COVID appears to fall sharply from the first to the second time someone gets sick, new research finds. The risk is still significant.