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They haven't given us the date for the 2021-2022 flu shot availability. They did tell us it will be one quadrivalent (4 different strains) formulation. It will likely be in the September or October timeframe that it becomes available.Good deal. I got my second shot March 30. I guess we should all be getting flu shots in September or October? Yes?
I couldn't tell from the linked article if the booster will be updated to cover Delta, Lambda, and others. Does anyone know?
So far, they're saying the current Moderna and Pfizer shots will provide enough coverage for the current variants, so unless something changes between now and the Fall, it will be the same formulation.
They're basing that decision on studies that have come out showing that Delta is still susceptible to antibodies and memory cell immunity:
Here’s How Well COVID-19 Vaccines Work Against the Delta Variant [Healthline]
Data so far suggests efficacy rates of more than 67 percent for the J&J vaccine, 72 to 95 percent for the Moderna vaccine, and 42 to 96 percent for the Pfizer-BioNTech vaccine.


