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In a paper appearing in this week's PNAS Early Edition, researchers at Duke University, China's Tsingua University, and at Sage Bionetworks in Seattle identify "type II cells, Clara cells in the terminal bronchioles, and putative bronchoalveolar stem cells as cells of origin for K-Ras-induced lung hyperplasia." The team also reports that of these, "only type II cells appear to progress to adenocarcinoma."

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The FDA and CDC call for a pause in administering Johnson & Johnson's SARS-CoV-2 vaccine while reports of rare blood clots are looked into, reports the Wall Street Journal.

According to the Associated Press, a Swiss program aims to shepherd long-term science projects and diplomacy.

CNN reports that two new studies suggest the B.1.1.7 SARS-CoV-2 variant may be more transmissible, but may not lead to more severe disease.

In PNAS this week: analysis of pathway affecting acute kidney injury, parental-specific allelic expression in horse placenta, and more.