Source: South China Morning PostFlu virtually disappeared in China’s most populous city after the coronavirus outbreak last year, according to a new study, but researchers still cannot explain why.The incidence of influenza peaked in Shanghai in February, at the height of the Covid-19 outbreak in the city, then dropped sharply to almost zero for the rest of the year, according to analysis of data from 30 hospitals across Shanghai.In a paper published in the Shanghai Journal of Preventive Medicine on Monday, a team led by…Read More