In the US comes the stop to masks for those who are fully vaccinated, according to the new guidelines of the Centers for Disease and Prevention. “The science is clear – the CDC said on Friday – if you are fully vaccinated, you are protected and you can start doing the things you stopped doing because of the pandemic”. Thus, two weeks after the second dose of the vaccine, there is no need to wear a mask, nor to observe social distancing. Except, the new federal agency guidelines continue, where it is prescribed by laws and regulations, such as on transportation, in hospitals and other institutions. What do the experts think? Read also “Even in Italy, right from the start, it should be said that vaccinated people can avoid wearing a mask” Matteo Bassetti, director of the Infectious Diseases Clinic of the San Martino hospital in Genoa, told Adnkronos Health. “Then there is the next step – he insists – which is to remove the obligation to wear a mask when we have reached 30 million vaccinated, which will take place in 2 weeks, for all at least outdoors”. The US position “is not one news – underlines the infectious disease specialist – The CDC had already expressed itself more than a month ago on the fact that among vaccinated the mask could be removed and that for the vaccinated it was possible not to do the quarantine or the control swabs, in case they came to contact with an infected person – recalls Bassetti -. It seems to me to be a decision of absolute common sense and I hope that soon some common sense can be restored also in our country “. As for the transmissibility of the virus from vaccinated to unvaccinated, the infectious disease specialist clarifies: “The scientific data tells us that, even if you were vaccinated to get the infection, your viral load is 90% lower than that of an unvaccinated subject. So the ability to transmit the virus is really in finitesimal. We cannot say that it is zero, but it is very close to zero “. The position of the microbiologist Maria Rita Gismondo, who calls for caution after the announcement of the American CDCs:” Leaving masks is still premature “is different. And” we must remember that the vaccine protects against the severity of the disease, but not against infection – the director of the Clinical Microbiology, Virology and Bio-Emergency Diagnostics Laboratory at the Sacco hospital in Milan tells Adnkronos Salute – so the virus continues to circulate “. filing ‘the masks, he warns, “I think it is prudent to wait a little longer for this circulation to decrease”. For the virologist Francesco Menichetti, head of infectious diseases at the Pisa hospital, “the one that the United States is starting gigantic field trial. We must be optimistic, but we must take into account that they vaccinated 10 times more than we vaccinated “he tells Adnkronos Health.” The US initiative – underlines Menichetti – is based on the assumption that the vaccine effectively breaks down the transmission of the virus; that is, it not only prevents the disease but eliminates the contagion or involves a contagion that is not clinically significant. It is a plausible assumption – admits the virologist – even though he does not have such well-established and consolidated evidence that would be necessary. “For this reason, he adds,” it is a decision that in my opinion is questionable “. In the United States they remove the masks and there are experts. Italians according to which 50% of the population is vaccinated to be able to do it in our country. Is that so? Faced with this question, the epidemiologist Stefania Salmaso, a guest at ‘Agorà’ on Rai3 expresses doubts. It would be true if it were vaccinated “the 50% you have to meet; and here 50% is not spread everywhere – he observes -. Either we meet everyone vaccinated because we are in the midst of a group of 80-year-olds, or we are among the boys and then no one is vaccinated. Statistically, when you then meet the infected “, the risk remains even with half the population immunized.