37 recovered COVID-19 patients in Japan test positive again for coronavirus: local media

A total of 37 people in 17 Japanese prefectures who recovered from COVID-19 tested positive again for the  coronavirus after getting negative results in previous tests, according to an investigation by local media Mainichi Shimbun.

Several Japanese medical experts said that there are three possibilities for these results: the virus left in the body being reactivated, new infections, or diagnostic error.

Japan's Health Ministry has asked patients who tested positive after recovering from COVID-19 to be observed for about four more weeks.