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Alan S. Drake's avatar

Plans for 2025-26 flu vaccines have 3 strains for egg based vaccines (FluZone and most others) and 3 strains for recombinant vaccine (FluBlok) BUT two of the three strains are different than the egg based vaccine.

Recombinant vaccines can be adjusted faster than egg based vaccines, so last minute adjustments of one strain have been made in the past for FluBlok. But this is March and the initial recommendation.

Why ?

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