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This week in PNAS, Harvard systems biologists used fine-needle aspirates to detect and profile cancer cells. The diagnostic magnetic resonance sensor, which combines a miniature NMR probe with targeted magnetic nanoparticles, "measures the transverse relaxation rate of water molecules in biological samples in which target cells of interest are labeled with magnetic nanoparticles," they say in the abstract.

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In a letter, about two dozen researchers criticize the World Health Organization investigation into the origins of SARS-CoV-2 and call for a new inquiry, the Wall Street Journal reports.

National Geographic reports that nine great apes at the San Diego Zoo have been vaccinated against SARS-CoV-2.

Janet Woodcock, the acting commissioner of the US Food and Drug Administration, speaks with NPR about SARS-CoV-2 testing and vaccines in the US.

In Science this week: genetic study of kidney fibrosis implicates the SOX9-NAV3-YAP1 axis.