Those "repositives" are not infectious cases though.

https://www.nature.com/articles/s41467-020-19802-w

"There was a low repositive rate in recovered COVID-19 patients in Wuhan. Results of virus culturing and contract tracing found no evidence that repositive cases in recovered COVID-19 patients were infectious, which is consistent with evidence from other sources."

Same paper also states that asymptomatic cases are much less likely to be infectious.