Icon vaccine protection in us old bastards
K
kravitz (view)

This I will summarize from the Sept 9, 2002 issue of US News and World Report, page 68:

Durable Protection by Katherine Hobson

Researchers at UNC-Chapel Hill say that the routine vaccinations, which ended in 1972, can last more than 35 years.The New England Journal of Medicine reported 6.5% of cells from people vaccinated less than five years ago mounted a defense, compared with 4.8% in those treated over 35 years ago.

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illegitimi non carborundum
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