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A paper in the early online edition of Science this weeks points to findings that suggest that lack of sleep leads to buildup of amyloid-beta protein in the brain, a hallmark of Alzheimer's disease. Monitoring the levels of this protein using in vivo microdialysis in mice, researchers led by Washington University scientists revealed that "preventing the mice from sleeping caused a 25 [percent] increase in amyloid beta levels," says a story in the Guardian.

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The Wall Street Journal reports on gaps in COVID-19 testing affecting less affluent urban areas and rural locations.

According to NBC News, new SARS-CoV-2 variants are making it harder for researchers to model the course of the pandemic.

The New York Times reports that experts say President Joe Biden's goal of vaccinating 1 million people a day in the US in the next 100 days is too low a bar.

In Science this week: single-cell lineage tracing technique applied to study lung cancer metastasis, and more.