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Probabilities of infection as a function of vaccine coverage and vaccine efficacy. (a,b) Probabilities of contracting chickenpox during childhood (pIJ) and adulthood (pIA) for those not vaccinated. (c,d) Probabilities of breakthrough infection during childhood (pBJ) and adulthood (pBA) for those who have received the vaccine. The vaccine efficacy varies linearly from lowest to highest values (table 4).
