Covid and third dose covid vaccine. What do the latest figures say? “In subjects vaccinated with an additional dose / booster, the effectiveness in preventing the diagnosis of” Covid-19 “and cases of severe disease is respectively 68.8% and 98%”, underlines the Higher Institute of Health. in the extended report on the progress of the epidemic in Italy. “The effectiveness of the vaccine (risk reduction compared to non-vaccinated people) in preventing the diagnosis of Sars-CoV-2 infection – details the ISS – is equal to 71% within 90 days of the completion of the vaccination cycle, 57% among 91 and 120 days, and 34% beyond 120 days. Vaccination efficacy in preventing cases of severe disease remains high: 95% in vaccinated with a full course of less than 90 days, 93% in vaccinated with a full course of 91 and 120 days and 89% in the vaccinated who have completed the vaccination cycle for over 120 days “. As for the rate of hospitalization for Covid in intensive care is equal to 26.7 per 100 thousand for the unvaccinated and 0.7 per 100 thousand for the vaccinated with cycle complete plus additional dose / booster: 38 times higher: this is one of the data that emerges from the extended report of the ISS.