Anjali Sundararaman, a student nurse at San Francisco State University, administers a dose of Moderna COVID-19 vaccine to Cuixia Xu during a vaccination clinic at the Southeast Health Center in the Bayview-Hunters Point neighborhood in San Francisco, California on Monday, Feb. 8, 2021.
Stephen Lam | San Francisco Chronicle | Hearst Newspapers via Getty Images
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Moderna is developing a single dose vaccine that combines boosters against Covid and the flu.
Shares jumped 4% after the announcement.