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Our Faithful Companions (No, Not the Canine Kind)

In a New York Times article today, Nick Wade reports on how studies of parasite DNA have shed light on the migration patterns of humans. Two examples -- Streptococcus mutans and Helicobacter pylori -- have been among their human hosts for thousands of years, and evolution patterns in their genomes can inform studies into how the human population dispersed around the globe.

 

The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.