In particular, “some behavioral aspects could explain the lower estimated vaccination efficacy in the age group 12-39, especially in relation to the risk of diagnosis. It is known, in fact, that in the overall population, also given the difficulties of contact tracing, a number of asymptomatic infections or with mild symptoms are not diagnosed, and this is likely to occur more frequently. in the young population, generally affected by the virus in a milder form than the adult population ”
