Regina Lai, a UCSF pharmacy technician, examines a dose of the Moderna COVID-19 vaccine. New booster vaccines are effective against Omicron variants and previous SARS-CoV-2 strains. Image by Susan ...
The U.S. Centers for Disease Control and Prevention expects a refreshed booster vaccine to be available next month, but it remains to be seen whether the new shot will be able to snipe a highly ...
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