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China first recognized the possibility of propagation through aerosols, or small particles in the air. China has decided to change the criteria for confirmation again, with more than 2,000 deaths.

This is correspondent Song Wook.

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The Chinese National Committee on Sanitation and Health says in the sixth edition of the Corona Treatment Plan, "It is possible to spread via aerosols."

In Hong Kong recently, the same apartment resident was infected, raising the possibility that the virus in the patient's feces could have spread through the toilet piping in the form of an aerosol.

At the time, the NHIC said the evidence was not clear, but it changed its position and acknowledged the possibility.

However, the aerosol propagation conditions are described as being exposed to high concentrations of aerosols for a long time in a closed environment.

Zhongnan, a Chinese epidemic specialist, says the virus has been isolated from the stool of patients with Corona 19, suggesting that sewage could be the source of infection.

[Zhongnan Mountain / Chinese Process Yarn: (Sewage) Dry contaminants or fecal virus can be released into the air and become infected if people inhale the aerosol.]

At the same time, the National Health Commission decided to remove the 'clinical diagnosis patient' from the scope of confirmation.

In Hubei province, the number of new patients increased to 15,000 on the 12th, as the clinical diagnosis also confirmed the infection.

The NHS explained the reason for the exclusion, because of its improved test capacity and shorter diagnostic time.

However, as the criteria changed again, the credibility of statistics became worse.

In China, there have been more than 74,000 cumulative confirmations and 2,000 deaths.