Fortunately, there was no additional confirmer at Samsung Seoul Hospital. Only one additional acquaintance of a confirmed nurse outside the hospital was infected. From the outset, it was believed that the spread could have started from acquaintances, and the health authorities decided to significantly increase the period of contact epidemiology.

Reporter Nam Joo-hyun.

<Reporter> On

the 19th, nurses at Samsung Seoul Hospital, who were confirmed asymptomatic, met five acquaintances on the first weekend after switching to street life.

I went to a restaurant, karaoke room, and pub in Gangnam Station. Among them, a nurse from Seosan, Chungnam, and an acquaintance who lived in Anyang, Gyeonggi Province, were confirmed one after another.

Health authorities are weighing on the possibility that Corona19 was spread to the hospital through the meeting, based on the timing, place, and multiple confirmed persons.

[Gwonjunuk / National Health Institute: occurring infection in the community's prior diagnosis First, I will say that the one in preference assume the possibility woke propagation between my staff hospital hospital happened since then -

current health authorities symptoms parties confirmed Two days before manifestation, and asymptomatic, two days before the examination, the contacts are found and managed.

Since Seosan Nurse, who met 10 days before the examination, was not classified as a contact person, if a nurse at Samsung Seoul Hospital did not recommend the examination to acquaintances after confirming himself, it would not have been able to find a confirmatory outside the hospital.

Health officials have advanced the time of contact investigations to May 7, two days before the meeting, to find and test 174 more contacts.

However, even with the characteristic of corona 19, which has frequent asymptomatic infections, there is a limit to greatly expand the scope of epidemiological investigations, and the concerns of health authorities are growing.