"we found that there are very few unidentified cases of people having covid infection that were never identified with it with a virus test," said dr. jay bhattacharya, a professor of medicine at stanford university and one of the paper's authors.
"we found that there are very few unidentified cases of people having covid infection that were never identified with it with a virus test," said dr. jay bhattacharya, a professor of medicine at stanford university and one of the paper's authors.