BA.2 FAQ: What you should know about this Omicron offshoot

An offshoot strain of the Omicron variant has been making headlines this week as it spreads rapidly in some European and Asian countries. While the strain, called BA.2 by virologists, has not yet been identified in the U.S. in large numbers, it’s already spreading here, too: scientists have picked it up in wastewater samples in some parts of the country.

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National numbers, January 30

Last week, COVID-19 case numbers started to indicate that the U.S.’s Omicron surge was turning a corner; this week, cases are clearly on the decline. National new case reports have dropped by about 24% in the past two weeks, from 784,000 new cases a day in mid-January to 597,000 new cases a day last week.

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FAQ: A refresher on test positivity rates

I’ve recently been getting a lot of questions about test positivity rates, both from COVID-19 Data Dispatch readers and from friends outside this project, which reminded me of just how confusing this pandemic metric can be. So, here’s a brief FAQ post about test positivity.

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