About three to 10 percent of patients who recovered from COVID-19 tested positive again after being discharged from hospital, doctors in Wuhan have found.
Researchers around the world are trying to determine whether recovered patients can still infect people with the coronavirus and if they have developed antibodies offering them immunity to the disease. Doctors said they have found no evidence that these patients who again tested positive became infectious, based on close observations of their family members and laboratory tests.
In spite of its relatively small sample size, the hospital research is especially relevant as China now has far more recovered patients than new confirmed cases.
The Chinese mainland, where the disease first emerged last December, has discharged over 90 per cent of its 81,000 infected patients and around 4,300 confirmed patients are still receiving treatment in hospitals. The country saw over 3,200 coronavirus deaths.