However, countries like China placed them in quarantine to observe them. Similar reports came from other countries as well, including Korea, where the local CDC reported in mid-April that hundreds of patients had tested positive again. The medical authority observed the evolution of the new patients in the weeks since then, and delivered the best possible preliminary news about coronavirus reinfections: It’s not a relapse.
The KCDC officials published the findings of the study online, revealing that it investigated 285 “re-positive” cases, as well as their 790 contacts. Of those, 27 contacts were positive, 24 of which were cases that were previously confirmed. The other three were cases that were exposed to a religious group or a case in their families, so there is a high likelihood that they were infected by someone other than the “reinfected” individual.
The study says that it took 45 days on average from initial symptom onset to test positive a second time, or 14.3 days from discharge. As many as 44.7% of the patients had symptoms including cough and sore throat, the report says. 60% of them were tested for screening, regardless of symptoms.
The doctors also discovered neutralizing antibodies in all re-positive cases as well as the newly confirmed cases, which is a marker of COVID-19 immunity.
— BGR.com (@BGR) May 19, 2020