Bivalent shots—and a single annual dose—may eventually become the norm.
people, Dr. Russo says. The vaccine rollout has been “haphazard,” he explains, and the public has often been unclear about which COVID vaccines they should get and when.
However, certain folks may still need extra protection each year. The FDA’s document suggested that older and immunocompromised people—two groups who face a higher risk of severe disease from COVID—as well as “the very young,” who may not have had previous exposure to the virus, may need two shots a year, but it’s unclear what this schedule would look like.
Dr. Russo says that giving most people one annual shot could, in fact, be risky at this stage in the pandemic. “Immunity—whether from prior infection or vaccination—wanes over four to six months,” he says. “You gain extra protection by boosting in that time frame.” While respiratory viruses generally circulate more during the fall and winter months, COVID-19 cases can rise during warmer months, though the spikes are usually less severe.
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