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Increasingly, cases of a complete cure and then again confirmed. This time, seven people were confirmed at a nursing home in North Gyeongsang Province at once, and the health authorities began an epidemiological investigation.

This was covered by Cho Dong-chan, a medical journalist.

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Seven out of 39 people who had cured Corona 19 were re-established at the Blue Sanitarium in Bonghwa, North Gyeongsang Province.

[People from Bonghwa-gun Public Health Center: I came after being cured, but I was a little worried. So I did a thorough investigation once again. All 39 were investigated.]

Across the country, 51 people were reconfirmed after being cured.

It is suspected that there was an error in the cure itself, but it is unlikely that seven people in the blue nursing home were cured in three hospitals.

Another possibility is the criterion of the cure.

When the coronavirus is less than the reference level, a cure is judged, but some people say that the amount of virus is less than the cure.

[Hong Ki-jong / Editor of the Korean Society of Vaccination: It may have been completely untreated. This is not a problem of diagnostic technology, it is not a problem of the treatment process, and I think that the original virus can exhibit such properties.]

The Chinese research team analyzed the cases of the re-positive decision, and all were reconfirmed between 4 and 17 days after the cure decision.

There were many people with no symptoms or mild symptoms, and the symptoms were mild even in the second positive period.

The problem is that the risk of infecting others in the period from cure to reconfirmation has not yet been identified.

Health authorities are considering how to measure the amount of antibodies in the body as well as the amount of virus.

[Eung-Kyung Jung / Director of Disease Control Division: Antibody testing is considered to be possible as an aid to see if immunity is being formed.

Depending on the rate of increase in the number of patients reaffirmed and the strength of the infectious disease, discharge criteria may vary.

(Video coverage: Park Seung-won · Kyung-wook Kim, TBC, video editing: Jeon Min-kyu)