Cell/recombinant vaccines: 2022 strain (A/Massachusetts/18/2022) substituted with A/District of Columbia/27/2023 (H3N2). 2. No Changes to H1N1 or B/Victoria Lineage H1N1 strains (egg: ...

That’s because there have been no confirmed flu cases caused by the Influenza B/Yamagata lineage since spring 2020. And the Food and Drug Administration decided this year that the strain now ...