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In a paper published online in advance in Science this week, researchers at the University of Virginia School of Medicine and the University of North Carolina at Chapel Hill, report on their identification of tens of thousands of "short extrachromosomal circular DNAs — microDNA — in mouse tissues as well as mouse and human cell lines." The team says these 200- to 400-base pair long microDNAs are "derived from unique nonrepetitive sequence, and are enriched in the 5' untransla

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Imperial College London researchers are shifting away from testing a COVID-19 vaccine to focus on combating newly emerging SARS-CoV-2 variants, the Independent says.

According to the Associated Press, genetic genealogy has helped law enforcement officials identify an unknown victim of the Green River Killer.

In PNAS this week: target to reduce chemotherapy-induced cardiac injury, tool finds ancient endogenous RNA viruses, and more.

Moderna reports its vaccine is effective against new SARS-CoV-2 strains, though it is also developing a booster, according to the New York Times.