Doctors urge flu vaccinations amid early U.S. season and new H1N1 mutation

U.S. doctors are urging individuals aged 6 months and older to get vaccinated following an unusual early rise in flu cases originating from the West Coast.

The predominant circulating H1N1 strain features a new G155E mutation that may leave younger people with less residual protection from previous exposure.

Public health data shows American adult vaccination numbers dropped more than 20% compared to the 2019-20 season.