There are more than half a million positive people in Shanghai. What are the characteristics of this epidemic?

0 1, the transmission speed is very fast, and the average incubation period is only 3~4 days. If it is not found early, it is likely to spread to 2~3 generations within a week. The epidemic in Shanghai actually started in February this year, and by mid-March, the cumulative number of confirmed cases had exceeded 1 000. In other words, after just over half a month, the number of confirmed cases increased by 10 times. By early April, the cumulative number of confirmed cases had exceeded 654.38+10,000, which was quite frightening.

02. The spread of Omicron variants is very strong, much stronger than influenza and previous variants. If you don't take personal protective measures, then a confirmed patient can spread 9 people. In addition, Shanghai itself has a relatively high population density, so there may often be a cluster epidemic in crowded workplaces, which is also the biggest feature of this round of epidemic.

03, strong concealment In this epidemic in Shanghai, the proportion of asymptomatic infected people is very high, which has exceeded 90%. Even if some confirmed cases have symptoms, the symptoms are relatively mild. The main symptoms are sneezing and runny nose, and some confirmed patients may have a sore throat. It is precisely because of the strong concealment of this virus that many patients think that they just have a common cold or flu, which prevents patients from seeking medical treatment in time, so it is easy to spread profitably.

Generally speaking, the epidemic lasted for a long time, and the epidemic is still fluctuating at a high level. In fact, it will take some time for Shanghai to achieve dynamic zero clearing. The reason why the epidemic situation in Shanghai continues to fluctuate at a high level is because some old communities are difficult to control because of objective conditions.