22 Sep, 2021 Using mathematical models, a quartet of Chinese scientists has argued that the first case of Covid-19 appeared between April and November 2019 in the northeastern US, long before the outbreak in Wuhan, China. “The calculation results show that the COVID-19 epidemic in the United States has a high probability of beginning to … Continue reading Covid-19 appeared in the US before Wuhan, Chinese scientists claim in new research paper