Why is the proportion of symptoms in the north much higher than in the south?

The reason why the proportion of symptoms in the north is much higher than in the south is that the two new coronaviruses currently infected in our country are BA.5.2 and BF.7, both of which are Omicron mutant strains. Subclade of BA.5. The strains in the south and the north are not of the same subtype, and there are also differences in the pathogenicity of the virus. In other words, the virus is still mutating.

On December 22, the Infection Center of Beijing Tsinghua Chang Gung Memorial Hospital affiliated to Tsinghua University held an infectious diseases forum, and Zhang Wenhong delivered a speech on "Progress in Infection and Immunity Research". Zhang Wenhong said that the proportion of symptomatic patients in the north is much higher than that in the south, and the proportion of symptomatic patients in Shanghai is between Beijing and Guangzhou.

The two new coronaviruses currently infected in our country are BA.5.2 and BF.7. Both viruses are sub-branches of the Omicron mutant strain BA.5. The strains in the south and the north are not of the same subtype, and there are also differences in the pathogenicity of the virus. In other words, the virus is still mutating.

Now in Beijing, Hebei and Tianjin and other areas in northern my country, the main infection variant strain of the new coronavirus is BF.7. The symptoms that appear after a positive infection are: high fever, coughing for several days, and physical symptoms. Pain, dizziness, headache, sore throat, loss of smell and taste to varying degrees, loss of appetite, vomiting, diarrhea, etc. But in Guangzhou and Shenzhen, Guangdong in the south, the main infected new coronavirus mutant strain is BA.5. After being infected with this mutant strain, although some people have the above symptoms, their symptoms are much milder than those in the north.

A few days ago, my son returned to Xinle, Shijiazhuang, Hebei Province from Guangdong, and visited his grandma’s house on the way. Later, my sister and I did not return to our mother’s house for a long time due to the epidemic. We also invited him to go back to his mother's place. Unexpectedly, on the second day after we came back, we were all infected and tested positive. Originally, when our son came back, he had no symptoms. We all still thought that it was impossible to be infected with the new coronavirus. I just thought it was a cold, with a fever of 39 degrees, a sore throat, coughing with phlegm in my throat, general weakness, and body aches. After the phone call, I was tested with a nucleic acid kit and found that it was not a cold, but completely COVID-19. Positive, the two red lines are obvious.

My son analyzed with me why the proportion of COVID-19 symptoms in the north is much higher than in the south?

1. There was not a single snowfall in the north this winter. The climate in the south was humid and in the north it was dry.

There has been no snow in Shijiazhuang in the north this winter, and there has been a lot of wind. It can be said that the weather this winter has been extremely dry. The climate in Guangdong is also humid because it is next to the sea. Our climate in the north is also very dry. The skin in Guangdong is not as dry as it is at home. My son told me that with humid air, people’s respiratory diseases will be relatively mild. This difference is very obvious.

2. The temperature is high in the south and low in the north.

My son also told me that in the south, the temperature is always a few degrees above zero. He can survive the winter wearing a thin cotton-padded jacket, but when he goes home, he has to wear a sweater underneath and a thicker jacket. A small cotton-padded jacket is enough, otherwise it will be very cold. Now in the north, the temperature is minus 6 to 7 degrees, sometimes even minus 10 degrees. The cold will weaken people's respiratory mucosa, reduce people's immunity, and easily be infected by viruses. The weather is very cold , the virus will be more active, the more active the virus will be, and the more contagious it will be.

Summary: My son told me that when his friends bought cold medicine in Guangdong, Lianhua Qingwen capsules were very easy to buy, but now that he is home, he buys cold medicine, isatis root, and cough syrup. , Lianhua Qingwen Capsules and other conventional medicines are difficult to buy. This also shows that the symptoms in the north are much higher than in the south. At the same time, my sister also called me and told me that buying cold medicines is very expensive. There are some commonly used medicines. Cold medicine is no longer available, which proves that the proportion of people with symptoms in the north is much higher than in the south.