In the last week, the percentage of reinfections out of the total number of Covid-19 cases reported in Italy has increased by 12%;
in the same period the cases reported with asymptomatic initial clinical status increased from 74% to 76%.
This was indicated by the Istituto Superiore di Sanità in its "Extended report on Covid-19: surveillance, impact of infections and vaccination efficacy.
"In this phase, characterized by the circulation of highly transmissible variants, it is likely that there has also been an increase in the proportion of people who have had an infection not notified to the surveillance systems for reasons related to both lack of diagnosis and 'self-diagnosis' . This phenomenon could lead to the underestimation of the incidence rate, and therefore of the relative risk, and of the vaccine efficacy ", notes the Istituto Superiore di Sanità.
