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Researchers report in Cell this week the genome sequence of Naegleria gruberi, an amoeba capable of shifting among three distinct morphological identities. Naegleria usually subsists as a common solid amoeba; under stress it generates two flagella for motility; further still, it can persist as a “hard cyst” in soil until moisture permits its return to its amoeba form.

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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.