i) Shao Yiming, a prominent virologist who is chief HIV/AIDS expert at the Chinese Center for Disease Control and Prevention (CDC) was reported by Caixin on March 20 as saying that Chinese health authorities initially failed to identify and control the threats posed by Covid-19 because of faulty assumptions and weaknesses in a carefully constructed direct reporting system.  

ii) Caixin (March 20) also reported that in a recent experiment led by the Chinese Academy of Medical Sciences, rhesus monkeys that recovered from coronavirus infections suffered no reinfection symptoms after being put back into contagious environments. The study found the monkeys produced antibodies that were key to resisting reinfection.
Chinese regulators have (Caixin, March 20) approved the start of start human trials of a vaccine against the novel coronavirus that causes Covid-19 by Hong Kong-listed CanSino Biologics Inc. CanSino is one of several vaccine developers around the world that are moving at unprecedented speed. Earlier, the WHO said (March 18) that it would launch clinical trials of Covid-19 treatments in various countries simultaneously as a coordinated effort to find a cure for the disease.

iii) The port of Fuzhou in eastern China is restricting vessels arriving from nine countries including the U.S. and Singapore to limit the spread of coronavirus by visiting ships and crews.