In the second half of the year, in the Shenzhen epidemic, Epidemic experts have been chasing the intersection of different cases in the vast crowd. They often find a phenomenon when looking through surveillance videos: outdoors spread from the air, and infected people have one thing in common: they don’t wear masks well.
Case 1: During the National Day, a citizen A from Shenzhen went to Inner Mongolia for a trip. After returning to Shenzhen, he was diagnosed on October 9.
Epidemic Investigation shows that at 18:00 on October 8, Case A and Case B met on the roadside of in Futian District, . Both of them did not wear masks, resulting in cross infection. On October 10, Case B was diagnosed. At present, there are more than 20 subsequent related infection cases caused by Case A.
Case 2: At the entrance of a living supermarket in Futian District, Shenzhen, confirmed case A was passing by and spitting sputum into the trash can next to it.
One minute later, Case B and two friends came to the supermarket to buy vegetables and wandered around one meter away from the trash can for about one minute. Case B, who was wearing white clothes, wore a mask, but her entire nose was exposed.
Two days after Case A was diagnosed, Case B was also confirmed to have an infection.
Shenzhen Futian District Center for Disease Control and Prevention found that the two belong to the same transmission chain. The epidemiological investigator pointed out that the spitting behavior of Case A forms the risk of aerosol transmission of . "Although the mask worn by Case B blocked his mouth, his nose was exposed, which caused aerosol to be inhaled into the respiratory tract, causing the virus to spread."
According to previous news from Shaoguan, Guangdong, in Guangdong, on the first transmission chain of the recent Shaoguan epidemic, a case returned to Shaohai from Hohhot on September 30. It did not strictly implement relevant epidemic prevention regulations. It did not wear a mask and walked to public places and spit anywhere, infecting several passers-by citizens, causing the mutant strain BF.7 it carried Shaoguan City socially. The case has been investigated.
Source: International Tourism Island Business Daily
