9:30 PM IST, 14 Apr 20219:30 PM IST, 14 Apr 2021Save(Bloomberg) -- The call came early in the Covid-19 pandemic. Drew Weissman, an infectious diseases professor at the University of Pennsylvania and an expert in messenger RNA, received a query from a Chinese company interested in using the new technology to make a vaccine against the coronavirus.mRNA, which effectively turns the body’s cells into tiny vaccine-making factories, has since become the breakout star of the Covid era, under... The call came early in the Covid-19 pandemic. , an infectious diseases professor at the University of...…9:30 PM IST, 14 Apr 20219:30 PM IST, 14 Apr 2021Save(Bloomberg) -- The call came early in the Covid-19 pandemic. Drew Weissman, an infectious diseases professor at the University of Pennsylvania and an expert in messenger RNA, received a query from a Chinese company interested in using the new technology to make a vaccine against the coronavirus.mRNA, which effectively turns the body’s cells into tiny vaccine-making factories, has since become the breakout star of the Covid era, under... The call came early in the Covid-19 pandemic. , an infectious diseases professor at the University of...WW…