Covid and the origin of the pandemic. For Massimo Clementi, director of the Laboratory of microbiology and virology of the San Raffaele hospital in Milan, the virus did not reach humans from animals. “Something happened that shouldn’t have happened and it didn’t happen because a virus, like Sars in 2003, passed through the Chinese food market and infected humans through various animals,” he told the microphones of ‘The entrepreneur and the others’ on Cusano Italia Tv. “The Sars-CoV-2 – explains Clementi – has an enormous diffusivity, but a relatively low mortality and this has generated doubts and perplexities”. Immunity from vaccine “If you are immunized with both doses” of the Covid vaccine, “you have a low probability of getting infected; if you only took one dose, you have too low an antibody level,” Clementi says of the new cases of contagion in the United Kingdom, linked to the Indian variant of Sars-CoV-2. “I was favorably surprised – he says – by the fact that in Great Britain, despite starting late, with an epidemic that at Christmas had reached very high levels in that Country, using the AstraZeneca single dose strategy, everyone managed to have a global protection that stopped the epidemic. So – he repeats – chapeau to Johnson and to this strategy that also went against some dictates of a scientific nature. – underlines Clementi, however – who had not reckoned with some eventualities, such as the Indian variant which is particularly ready to infect people with antibodies, especially those who do not have high immunity. a “Third dose. If the third dose of the anti-Covid vaccine” is necessary we will have to decide in September-October, because at that time we will have an overall assessment of the current situation: how many subjects will be vaccinated, how many will have achieved full immunity and also what the pharmaceutical industry will tell us “. “These vaccines – he underlines – can be modified in a tailor-made way with respect to the virus that circulates, this is the great advantage that the messenger RNA technology has given us. This will radically change our way of approaching infectious diseases”. “With this pandemic, ‘virologists-non-virologists’ have arrived on television who have taken over the scene, but they are people more used to cabaret than to science”. “These people – he says – have represented, especially in the media, a destructive element towards the scientific discipline. We – he warns – must prepare real virologists for tomorrow, people who work at the interface between the animal, human and natural world, because epidemics of this type are born there “.