Covid-19: five years later, the origins of Sars-CoV-2 still unknown
Leak from a laboratory, guilt of the pangolin, the bat, local market, frozen food… Five years after the appearance of Covid-19, the international scientific community has not been able to determine with certainty its origin. On January 11, 2020, the world learned of the death of the first official victim of atypical pneumonia, later identified … Read more