On the origin of Covid, the director general of the World Health Organization (WHO), the Ethiopian biologist Tedros Adhanom Ghebreyesus, argues – in an interview on the ‘Corriere della sera’ website – that all the hypotheses “must continue to be examined. , from that of transmission from animals to that of leaving the laboratory, which has not yet been categorically excluded “. To shed light on what happened in Wuhan between late 2019 and early 2020, WHO has created a group of international experts from different disciplines who will have to establish the state of knowledge. As well as preparing responses to the emergence of pathogenic threats in the future. Regarding the inquiries into the origin of the crisis, the question of whether the virus “jumped” from an animal to man or was created in the now famous Wuhan laboratory and then escaped control, Tedros was criticized, especially by the White House by Donald Trump but to a lesser extent also by Joe Biden, for being influenced by China. And to have sent to investigate in the Chinese city from which everything was born a group of scientists welcome to the Beijing authorities, who had only partial access to the laboratory data and then established that the greatest probability of the origin lies in the passage from animal to man, leaving only a small window open to the laboratory hypothesis. In recent months, however, some American scientists have argued that, by analyzing samples of the coronavirus from the first patients, it is understood that the probabilities by far greater lead to believe that the right track is that of the escape from the laboratory. Tedros does not close the door to this possibility. But unfortunately, if Beijing does not openly collaborate by allowing an independent international investigation that can access all the data, the irrefutable truth about the birth of the pandemic will almost certainly not be established. put the booster programs, i.e. the third dose, on hold at least until the end of the year. “Instead of vaccinating those who are already vaccinated we must vaccinate those who run the highest risk”, also to limit the creation of variants of which it is not known what potency they might have. By the way, according to the CEO, there is no consensus among scientists on the need for a third dose.