Flu season comes around like clockwork every year, and sooner or later everyone gets infected. The annual flu shot is a key part of public health efforts to control the flu, but the vaccine’s effectiveness is notoriously poor, falling somewhere from 40% to 60% in a typical year.
Study provides insight on how to build a better flu vaccine
![](https://internalmedicine.wustl.edu/app/uploads/2020/09/GettyImages-1266490076_forweb-760x507-1.jpg)
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