Lessons from the epidemic in Shanghai: 0 1 In recent years, the epidemic has increasingly become the core economic problem of China's people's livelihood, among which the newly confirmed cases in Shanghai have jumped continuously, surpassing Jilin and becoming the most serious place. After Pudong Puxi's policy of "Yuanyang closing the city" was introduced, although Shanghai was ridiculed and beaten in the face, strictly speaking, Shanghai did not close the city. The first feeling is that the enemy we are facing this time is different. Compared with the original strain BA. 1 in Wuhan the year before last, the subtype of Omicron mutant strain BA.2, the chief culprit of the epidemic in Shanghai last year and even this round, has an obvious difference, that is, it is particularly hidden and is called "invisible Omicron".
At the beginning of 2020, the R0 value of the original COVID-19 strain was between 2.5 and 3, and the R0 value of the popular Omicron BA.2 was as high as 10! Especially in places with high vaccination rate, Omicron's BA.2 is more prone to a large number of asymptomatic infections. Therefore, in this round of epidemic in Shanghai, the proportion of asymptomatic infected people actually exceeded 95%, and the severe and critical types were less than 0. 1%. Asymptomatic means that ordinary people can't even know that they have been infected. Unless they take the initiative to remove nucleic acids, as long as there is a source of infection in society, even if the software and hardware are excellent in all aspects, it is difficult to catch up with the spread of the virus. To make matters worse, the key to accurate prevention and control is to persist in epidemic control, trace the virus to its source, and control all potential infection possibilities. Others "run and dance with horses", which is the fundamental reason why Shanghai was able to achieve scientific and accurate prevention and control in the past. However, the latent period of a large number of asymptomatic infections in Omicron BA.2 is very short, and the speed of turning positive to negative is extremely fast. When I wanted to go to Shuoyuan, the real case No.0 was negative and the epidemic turned into a headless fly. I don't know where to start. As a result, all the twists and turns were useless, and finally we could only return to the most rude, economical, but also the most effective method: the whole city stopped+the whole people nucleic acid.