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As you just saw, there have been many cases of such infections, and the bigger problem is that more and more people are not sure who was the first to be infected and how it spread. It is also the area of ​​concern for health authorities.

Reporter Nam Joo-hyun will tell you why.

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result of epidemiological investigations on confirmed cases that occurred in the last two weeks, the path of infection is unclear and 8.9% are being investigated.

More than 7.6% a week ago.

Small group infections that occur two or three people are occurring everywhere, because there are not many cases where the path of infection cannot be found.

It is a so-called'blinker infection' that is out of the quarantine network.

[Jeongeungyeong / Disease Management Division: dark dwaeseo infection is propagated as having such vulnerable groups of elderly and underlying disease, medical, nursing homes, and fears that lead to casualties of high risk seniors]

actually care bohosa in Happy Nursing Home in Gwangju Beginning, all seven were confirmed, but the route of caregiver infection was still unknown.

Health officials explained that in order to control the prevalence of corona19, including blink infection, the'reproduction index', which means the number of patients infected by one confirmed patient, must be maintained at the 0.5 level.

The reproductive index rose to 5 at the time of the Shincheonji epidemic, and has fluctuated between 1.2 and 1.9 since the Itaewon club infection.

In order to lower the reproduction index, it is important to strictly observe the prevention measures such as distance, and to be examined quickly if symptoms occur.

(Video coverage: Kim Min-cheol, video editing: Park player)

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