There is not much difference in pathogenicity between the northern and southern strains, is there?

Judging from the recent epidemic situation, some people think that the symptoms in the north are more serious than those in the south. Such a statement is only a superficial phenomenon. The reason for this is that there is little difference in pathogenicity between the northern and southern strains, and symptoms will appear in the short term after infection in the north.

1. Dong Li once said that the specific causes of these symptoms are still under analysis. In foreign countries, these two strains have been popular for some time. According to foreign reports, the pathogenicity of these two strains is the same, and there is no obvious difference. In China, from the upper respiratory tract and other symptoms of the whole body, there are obvious differences between north and south. It may be influenced by climate, temperature and humidity. For example, if the north is dry and cold, the somatosensory symptoms will be significantly heavier. For example, the symptoms of upper respiratory tract infection are more obvious in winter than in summer, and you will feel worse.

Second, on the whole, we now say that the proportion of symptoms after infection with virus in the north is higher, or that the symptoms after infection with BF.7 variant are lighter than those after infection with BA.5.2 There is still no clear evidence, so there is no need to argue. However, one thing that needs to be recognized is that BA.5.2 and BF.7 are both sub-variants of Omicron's variants, and there is not much difference in essence. It is not that the virus causes more people to have symptoms and is more serious.

3. What are the symptoms of Omicron? Most people infected with Omicrovirus will begin to show symptoms within 2-3 days. However, some strong people often do not feel unwell for more than 10 days after being infected with Omicron, but their nucleic acid test results are positive. Therefore, these people are called "asymptomatic infected people". However, such people are also contagious and need to be isolated. Compared with the previous Omicron virus, the current virus is more contagious and concealed, but its symptoms are gradually decreasing.

Fourth, it is not advisable for everyone to be together. Zhong Nanshan said that there is a saying that "it is better to celebrate early than late, so we cannot celebrate together". Because a large area of infection in a short time will affect the normal social order and easily lead to the emergence of new variants. Zhong Nanshan strongly calls for accelerating the intensive vaccination of vaccines, especially xenovaccines. At the same time, he also stressed that personal protection is still very important, such as wearing a mask, washing hands frequently, regular ventilation, and a meter line.