Plasma From Coronavirus Survivors Could Treat Current Patients

A 100-year approach shows promise for Covid-19

A doctor who has recovered from Covid-19 donates plasma in Wuhan, China. Photo: STR/Getty Images

In 1890, Emil von Behring and Shibasaburo Kitasato published a landmark study showing that they could cure guinea pigs infected with diphtheria. To do it, the scientists injected the guinea pigs with serum taken from animals that were immune to the disease. At the time, diphtheria…