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We’ve broken down the chances of transmission at a gathering with one unvaccinated adult, multiple unvaccinated adults, and unvaccinated or semi-vaccinated kids.
 

Pfizer Inc’s final analysis of data from the trial of its antiviral COVID-19 pill showed that it still had near 90% efficacy in preventing hospitalizations and deaths in high-risk patients.
 

America’s response to the variant highlights both how much progress we have made over the past two years — and how much work remains.
 

COVID-19 rapid tests are hard to find in stores, and PCR testing appointments are getting tough to find, too. It's a deja vu moment with long lines once again to get a COVID-19 test.
 

Almost two years into the pandemic, at-home rapid tests can still be difficult to find in the U.S. If you do find them, they're often expensive. Other countries are faring better, like the U.K. and South Korea, which provide free tests each day to anyone who wants them.
 

Mitigation methods like vaccination and rapid testing will play an important role in keeping the holiday season safe.
 

There are ways to soften the blow of the pandemic this winter. The best thing to do is to get vaccinated against Covid-19 if you haven’t already. The next best is to get a booster shot if your last vaccine dose was more than six months ago. After that, there is another crucial measure that some Americans have neglected: continued testing. 

Viruses don’t care who they infect, how long the infection lasts or what the disease they induce is like. A virus doesn’t care about anything because all a virus needs to do is find a new host in which it can propagate. That is it.
Andy Pekosz wrote the piece. [Opinion]

William Moss and Amesh Adalja are quoted. 
The detection of the Omicron variant has brought renewed attention, and a new urgency, to the worldwide Covid-19 vaccination campaign, which experts say remains among the most powerful tools at our disposal when it comes to preventing dangerous new variants.
 

Who’s “fully vaccinated” against Covid-19 — and who’s not — is starting to get a lot more complicated.
 

Human blood samples and the substance that makes fireflies glow are among the tools that scientists are using for early clues about whether Covid-19 vaccines retain their effectiveness against the new Omicron virus variant.
 

With its vast wealth and scientific capability, the United States held on to its top ranking among 195 countries, even as it scored lowest on public confidence in government — a factor associated with high numbers of cases and deaths