So much for putting people back to work who have had covid-19

Bloomberg reported Thursday that the Korea Centers for Disease Control and Prevention (KCDC) said in a statement announcing a formal investigation that dozens of patients have retested positive for the disease.

“While we are putting more weight on reactivation as the possible cause, we are conducting a comprehensive study on this,” KCDC Director-General Jeong Eun-kyeong said, according to Bloomberg. “There have been many cases when a patient during treatment will test negative one day and positive another.”

NPR reported late last month that similar cases were also discovered in Wuhan, China, where health officials say that some people who tested positive weeks ago for the virus have tested positive again, including two doctors treating patients with the virus.

  The Hill

Does that say more about the test or the disease? And, if there's no problem with the tests, but people can indeed become re-infected or reactivated...doesn't that sort of negate the idea of a vaccine?

Japan in February reported its first case of a person testing positive twice for the disease. Some health officials have warned that the virus could remain dormant in the body before reaching the lungs and causing havoc.

Sleeper cells.