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Omicron’s Evolution and the New Bivalent COVID-19 Booster

Last month new “bivalent” booster vaccines made by Moderna and Pfizer became available that protect against currently circulating Omicron variants as well as earlier strains of the SARS-CoV-2 virus that causes COVID-19. This Q&A features Joel Ernst, MD, a UCSF professor of medicine whose research aims to understand how pathogens evade the immune system.

Regina Lai, pharmacy technician at UCSF, examines a dose of the Moderna COVID-19 vaccine

Older Homeless People Are At Great Risk of Dying

The study, funded by the National Institute on Aging, recruited people who were 50 and older and homeless, and followed them for a median of 4.5 years. By interviewing people every six months about their health and housing status, researchers were able to examine how things like regaining housing, using drugs, and having various chronic conditions, such as diabetes, affected their risk of dying.

A tent of an unhoused person is set up next to three garbage bins behind a building