Up to 10 percent of coronavirus patients leaving medical facilities in Wuhan after being tested negative for Covid-19 seem to have subsequently been re-infected, according to the South China Morning Post. This is not the first time that there have been reports of re-infection. Nevertheless, scientists say that it is unlikely that the virus is striking twice. Advertising Read more .a{fill:none;stroke:#9a9a9a;stroke-width:2px} Doctors in Wuhan are bemused. Healthcare workers in this central Chinese city where the coronavirus first emerged have observed several instances in which patients have left hospital with no remaining traces of the virus in their bodies and...