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In a report published online in advance in Science this week, investigators at the Wellcome Trust Sanger Institute and their colleagues show that "insertional mutagenesis by the PiggyBac transposon can be used for cancer gene discovery in mice." In their analysis of 63 hematopoietic tumors, the team found that PiggyBac "is capable of genome-wide mutagenesis." In their screen, the Sanger Institute-led team found several cancer genes that were not identified in screens using other retrotranposo

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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.