The Delta variant of Covid “is more infectious that can be controlled quite well by a full vaccination course, so it is very important that people complete the vaccination with 2 doses, especially those 800,000 elderly people who have to get vaccinated. no vax must be respected and left alone, but people who are undecided because they are frightened must be convinced to vaccinate, the older they are, the more they risk developing a serious disease. Vaccination does not protect completely, but in all cases it makes the disease much less serious ” . This was stated by Guido Forni, immunologist of the Accademia Nazionale dei Lincei, who spoke at ‘Italy has awakened’ on Radio Cusano Campus. On the possible fourth wave. “I believe that at the end of this summer we will understand what will happen. If the disease returns, it does not return or if it returns in small outbreaks. Today nobody can give precise indications – he warns – they can only give opinions, make predictions according to some mathematical models. become something like the flu and it will come back every winter, it could disappear, they are all possible scenarios, it is difficult to predict what will be waiting for us ”.