https://apnews.com/90175dd9277dc4bec6b6699c8f14e6f0 > John Wherry will wait until later in the fall to consider getting an updated COVID-19 booster. The University of Pennsylvania immunologist knows it's too soon after his shot late this summer, especially since he's not at high risk from the virus. > It’s the kind of calculation many Americans will face as booster shots that target currently circulating omicron strains become available to a population with widely varying risks and levels of immunity.