https://www.opilecce.it/web/2021/11/02/negli-usa-approvato-il-vaccino-pfizer-per-la-fascia-di-eta-5-11-anni-efficace-al-907-nella-prevenzione-del-contagio-fda-il-vaccino-e-sicuro-e-i-benefici-superano-i-rischi/