A study from South Korea, with new data on patients who had recovered from coronary artery disease and had a negative test, but then tested positive again, Elias Mosialos cites and explains the phenomenon.
According to a study published by Bloomberg, patients in South Korea who had recovered but then tested positive for coronavirus did not pass it on to other people. The same study concluded that those with coronary heart disease developed antibodies that protected them from re-infection and that the strange phenomenon with those found again positive for coronary artery disease has an explanation (in the PCR test technique). In fact, it is reported that the characterization of these patients will change from re-positive to PCR re-detected after discharge from isolation (re-detection after exiting the isolation).
“News from South Korea – those who have recovered are not transmitting coronavirus and may have developed antibodies that will prevent them from getting sick again. New data shows that former COVID-19 patients with a second positive diagnosis in coronary heart disease do not transmit the infection and may have developed antibodies that will prevent them from getting sick again.
Researchers from the Korean Centers for Disease Control and Prevention (KCDC) studied 285 former COVID-19 patients who were positively diagnosed with coronavirus after their disease clearly reappeared, as indicated by the negative result in their latest molecular diagnostic tests. As of April 14, such cases have been treated with measures similar to those for confirmed cases, and further investigation and analysis of the specific cases has continued.
Based on active follow-up, epidemiological research, and virological testing of these cases and their contacts, no evidence of infection was found in these former patients. An investigation into 790 contacts of 285 former patients who were diagnosed positively was not found to be contaminated exclusively by contact with such cases. Research has shown that PCR tests cannot tell the difference between dead and viable virus particles. Even more important, however, is that the laboratory results of the virus culture tests of 108 such former patients were all negative.
This means that health authorities in South Korea will no longer consider people contagious after recovering from the disease. The reporting and investigation of such bi-positive patients and the investigation of their contacts will continue. However, based on the recommendations of experts, the terminology referred to in such cases will change (from re-positive to PCR re-detected after discharge from isolation.)
As a result of the study’s findings, authorities said that, according to revised protocols, former patients could return to work or school after recovering from their illness and completing their isolation period.