The United States takes the masks off the vaccinated. And in Italy? “In Italy it is not the time yet”. Fabrizio Pregliasco, virologist at the State University of Milan, comments to the Adnkronos Salute on the new guidelines of the Centers for Disease and Prevention (Cdc) USA which provide for a full return to normal life for the fully vaccinated, without masks or social distancing. “An indication of a return to normal life – underlines Pregliasco – is an indication applicable in the United States which are far ahead of us with vaccinations. For us the fact that there is still a high circulation of the virus, even if in decrease, involves a risk because there is a certain percentage of ineffectiveness of the vaccination and therefore – the virologist reasons – the probability of encountering a positive subject and not being protected is still an element of risk to be evaluated “. Furthermore, “at this stage there is a probability even for vaccinated people to contract the disease, even if in a mild form.” Meanwhile, the debate is ignited on the possibility of combining a dose of AstraZeneca vaccine with one of Pfizer vaccine. The solution appears safe based on the results of a British study. “It was something expected, because the possibility of mixing vaccines had already been seen with other types of vaccinations and therefore this is certainly useful in the continuation and organization of the anti-Covid immunization campaign,” says Pregliasco. “For now it is a study and the study – recalls Pregliasco – must then be validated and formalized as a formal indication. It is a good thing, but there is still time. In perspective, if a third dose is needed, it could be a useful indication “.