Every year, I wait until the last possible day to get vaccinated because flu shot effectiveness wanes over time, especially in high-risk individuals.
Despite public health messaging urging vaccinations as early as September, flu levels in the US remain low until December, causing a potential waste of vaccine-induced antibodies.
The CDC focuses on vaccine uptake rates instead of considering the more important metric: the percent of severe illnesses averted by vaccination.
Tens of millions of Americans are vaccinated early, but many waste their immunity when the flu virus is not yet prevalent.
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