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Public health experts warned it could happen for months, but for many, that hasn’t made the news of the latest COVID variant any easier.
 

The emergence of a new Covid-19 variant with a startlingly large constellation of mutations has countries around the world sounding alarms.
 

The United States on Wednesday identified its first known COVID case caused by the Omicron variant, discovered in a fully vaccinated patient who traveled to South Africa, as scientists continue to study the risks the new version could pose.
 

After a slow start, the United States has improved its surveillance system for tracking new coronavirus variants such as omicron, boosting its capacity by tens of thousands of samples per week since early this year.
 

The Omicron variant contains more unusual mutations than previous strains, and it could be more transmissible and vaccine-resistant potentially.
 

Amesh Adalja talks about the latest news regarding COVID-19 vaccines and therapeutics and the winter outlook for the pandemic

With the announcement of booster doses coming amid cold and flu season, can you get a booster shot if you are currently sick?
 

Britain, Israel and others announced new restrictions as some health experts urged caution.
 

Senior health officials are calling for Americans to get vaccinated — and get their booster shots — as cases tick back up across the country and the approaching holiday season brings with it more indoor, maskless gatherings.
 

Testing is so complicated because we’re asking it to do too much.
 

Coronavirus cases are rising in more than 30 states ahead of Thanksgiving. It comes as the White House reports about 3 million Americans received a third dose over the weekend following the FDA's authorization of both Moderna and Pfizer's booster for all adults.
 

Amesh Adalja discusses the latest news regarding Covid-19 vaccines and therapeutics and the winter outlook for the pandemic.