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A recent article in Nature News describes how Leonid Margulis was trying to grow HIV in tonsil tissue infected with herpes, but he couldn't sustain the HIV infection. (Co-infection seems to accelerate HIV progression in people.)  This strain of herpes (HHV-6) blocks the CCR5 receptors that HIV uses to enter cells -- exerting a selective pressure on HIV that makes it more virulent.

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Kelvin Droegemeier, the director of the White House Office of Science and Technology Policy, is the new acting director of the US National Science Foundation.

An opinion piece at the Guardian discusses the state of SARS-CoV-2 testing in the UK.

Wired reports the University of California, Berkeley's Innovative Genomics Institute has transformed itself into a diagnostic lab to run SARS-CoV-2 tests.

In Nature this week: direct-capture Perturb-seq approach for combinatorial single-cell CRISPR screens, potential uses of genome-editing in breeding crops, and more.