Survey results that the new coronavirus 'repositive' will not spread infection

On May 19, 2020, the Korean Ministry of Health and Human Services (KCDC) said, `` Patients who test positive again after recovery from new coronavirus infection (COVID-19) do not infect the new coronavirus in their surroundings. It was reported. This is expected to pave the way for economic resumption, such as lifting restrictions on outing for those who have recovered from COVID-19.

Findings from Investigation and analysis of re-positive cases | Press Release | News Room: KCDC

Recovered COVID-19 patients test positive but not infectious, data finds | Ars Technica

COVID-19 patients testing positive for second infection not contagious, study shows | TheHill

The outlook remained uncertain, with WHO warning 'unknown' about whether people who have recovered from COVID-19 have acquired immunity to prevent reinfection. WHO also said on April 24, 'There is no evidence that there is a so-called' immune passport 'or' risk-free certificate 'that people who have recovered from COVID-19 will not be reinfected and will be allowed to go out and travel. of the No ' statement it has been announced.

WHO warns that it is unknown whether healers of the new coronavirus have acquired immunity-GIGAZINE

Meanwhile, in South Korea, 277 out of 1600 patients who recovered from COVID-19 on April 30 were reported to be positive by retesting. Oh Myung-Dong, chairman of the Central Clinical Committee for New Infectious Diseases in Korea, said, `` The remnants of the new coronavirus remaining in the body are not detected by PCR tests, rather than reactivation and reinfection of the new coronavirus. It is likely that they have been detected. '

`` Re-positive of new coronavirus may be virus debris detected by PCR test, '' Korean expert committee expressed opinion-GIGAZINE

In addition, KCDC has recently conducted a follow-up study of those who have had close contact with 285 patients who were diagnosed as repositive by the new coronavirus test after recovering from COVID-19. As a result, a total of 790 close contacts were identified, including 351 families with repositive cases. However, none of the identified concentrated contacts developed COVID-19.

Also, attempts to culture new coronavirus samples from 108 repositive patients did not result in successful isolation. This means that the virus shed from the repositive patient was already inactivated.

In response to the findings of this survey, KCDC said, 'As of May 19, we will stop applying the conventional protocol for management of repositive cases found after discharge. With the new protocol, additional tests will be conducted for cases after discharge. Will not be performed. ”And decided that repositive patients would not need to be quarantined again because they were not infected.

In addition, although we continue to report and investigate re-positive cases for research purposes, the term that refers to cases that became positive again after testing after recovery from COVID-19 will be changed from 're-positive' to 'PCR re-detection after isolation. It will be changed to '.

'The reverse transcription-polymerase chain reaction (RT-PCR) method was used to test re-positive patients, which says that the genetic material of the new coronavirus is present in the airways of test subjects,' said Ars Technica, an IT news site. It is confirmed if it exists, but just because the genetic material of the new coronavirus does not mean that the person has the infectious new coronavirus particles. Sometimes there is just a piece of genetic material left over. '

On the other hand, while the US political paper The Hill said, 'The findings may be important for discussions on economic resumption and safety standards of state and local governments,' but 'KCDC reports, Despite the suggestion that those who have recovered from COVID-19 have acquired the antibody, 126, or 44.7% of repositive patients, have symptoms such as coughing and sore throat. ' , Said the situation was uncertain.

in Note, Posted by log1l_ks