For ten years, Americans have had access to flu shots that protect against four different strains of the flu—two A strains and two B strains. Starting this fall, however, all the flu shots ...

But the B/Yamagata lineage looks to have taken the hardest hit. While other strains rebounded in the years since, causing an early and fierce 2022-2023 flu season in the US, B/Yamagata remains ...

No one has confirmed a case of influenza B/Yamagata since April 2020. Beth Mole – Sep 30, 2022 7:08 pm | 146 A bottle of influenza vaccine at a CVS pharmacy and MinuteClinic on September 10 ...

The absence of B/Yamagata won’t change the experience of getting this year’s flu shot, which the Centers for Disease Control and Prevention recommends to everyone over 6 months old.