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West Coast Flu Outbreak Sparks Urgent Vaccination Call
20 Oct
Summary
- An early flu rise on the West Coast is concerning doctors.
- A new mutation in the H1N1 strain may reduce vaccine effectiveness.
- Flu vaccination rates in the US have seen a significant decline.
Doctors are strongly recommending flu vaccinations for all individuals aged 6 months and older following an unseasonably early surge in flu cases, particularly on the West Coast. This increase is attributed partly to a new mutation, G155E, in the predominant H1N1 strain, which may lessen the protective effects of prior immunity.
The 2026-2027 flu vaccines target H1N1, H3N2, and an influenza B virus. While manufacturers report consistent demand, vaccination rates have notably decreased. Last season saw a more than 20% drop in adult vaccinations compared to the 2019-20 season, and about half of US children received flu shots, down from over 60% in 2019-20.
This decline in vaccination rates is potentially linked to a reduction in promotional efforts by the US Department of Health and Human Services. Experts noted that flu activity, while currently low, has been rising since late August, with positive test rates hitting a 10-year high for this time of year. The West Coast is reporting significantly higher rates than the previous year, and elevated numbers are also seen in several Southern states.
