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 vaccinated with full cycle plus additional dose / booster: 38 times higher. This is one of the data emerging from the extended report of the Higher Institute of Health on the progress of the Covid-19 epidemic in Italy. REINFECTIONS – “From August 24, 2021”, the day in which Covid reinfection cases were included in the daily data flow, “as of January 12, 2022, 70,629 cases of reinfection” by Sars-CoV-2 have been notified, “equal to 2 , 5% of the total number of cases reported (total first diagnoses since 24 August) “. In particular, “up to December 13 every week, reinfections represented approximately 1% of the total number of notified cases”. With the spread of Omicron, more capable of ‘piercing’ immunity than Delta, the percentage has risen and nevertheless, “although the figure is still in the consolidation phase, in the last week the percentage of reinfections (3.3% ) out of the total number of cases reported is stable compared to the previous week (3.1%) “.” The probability of contracting a reinfection – underlines the ISS – is higher in unvaccinated than in vaccinated with at least one dose, and in operators health compared to the rest of the population “. BOOSTER – “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. The vaccine 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 more than 120 days “.