> Has she seen it fail clinically? Flu vaccine efficacy has been <50% for over a decade. Usually it floats around 30-40%. So even by the official numbers, it

> Has she seen it fail clinically? Flu vaccine efficacy has been <50% for over a decade. Usually it floats around 30-40%. So even by the official numbers, it doesn't do a lot for groups not really at risk. This is not a surprise: The yearly shots are for a subset of flus, created in the spring/summer for the strains they think will be most prevalent in the fall.