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Put on a Happy Face -- If That's Something Your Genes Let You Do

This article in the Economist reports on research indicating that there may be a genetic basis for optimism. Scientists at the University of Essex in Britain took DNA samples from about 100 people and then tested the subjects by showing them "photographs that may be positive, negative or neutral in tone" and measuring their response. "Sure enough, gene-related variation caused a bias in attention towards positive and negative material," the article says. Results showed differences in the genes connected with serotonin among the subjects.

The Scan

Could Cost Billions

NBC News reports that the new Alzheimer's disease drug from Biogen could cost Medicare in the US billions of dollars.

Not Quite Sent

The Biden Administration likely won't meet its goal of sending 80 million SARS-CoV-2 vaccine doses abroad by the end of the month, according to the Washington Post.

DTC Regulation Proposals

A new report calls on UK policymakers to review direct-to-consumer genetic testing regulations, the Independent reports.

PNAS Papers on Mosquito MicroRNAs, Acute Kidney Injury, Trichothiodystrophy

In PNAS this week: microRNAs involved in Aedes aegypti reproduction, proximal tubule cell response to kidney injury, and more.