Korean Covid-19 patients who have recovered but then tested positive for the virus appear to not get reinfection but the remaining of virus fragments causing the results, South Korean experts affirmed. 

Those who recover from the coronavirus are probably not going to catch it again, at least in short term while the question on how that immunity would last is still unclear, NBCNews cited experts as saying. However, Up to 10 percent of coronavirus patients leaving medical facilities in Wuhan after being tested negative for Covid-19 seem to have subsequently been re-infected, according to the South China Morning Post.