"I was infected with COVID-19 in December last year, and in May, I came here again." Ms. Chen, a citizen, was puzzled about her "Sanyang". Recently, the number of COVID-19 infected people has increased again, and there are many infected people similar to Ms. Chen. The reporter of Yangcheng Evening News visited the respiratory departments of many hospitals and found that the number of COVID-19 infections increased significantly among the recent outpatient and inpatient patients. "Another small peak is coming. There are three or four patients in the respiratory ward of our hospital." An expert told the reporter, "Some infected people have been 'three positive' and 'four positive'. Since the fall, flu has been high, and now it is found that COVID-19 also has a seasonal trend." Outpatient: "two positive" is more common, but also "three positive" At present, multiple cases of COVID-19 infection are more common. Ms. Chen has been on a business trip to Hunan recently. During the high-speed train ride, she felt a sore throat. At first, she thought it was due to eating barbecue and getting hot, drinking more water and herbal tea, but it didn't improve for a day or two. Subsequently, she developed symptoms similar to a cold, with a stuffy nose, runny nose, and overall fatigue. After going to the hospital for an investigation, the doctor asked about the medical history and said: "COVID-19, COVID-19 is the best in eight or nine." Ms. Chen, who has not escaped "the first sun" and "the second sun", wondered: Is the peak of COVID-19 "the third sun" coming? The reporter learned that recently, the number of COVID-19 infected patients in the respiratory department of the Second People's Hospital of Guangdong Province and the respiratory department of the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine increased significantly. "Recently, I really met many COVID-19 positive patients, and I have several friends' Sanyang 'around me," said Yan Wensen, deputy chief physician of the respiratory department of the Second People's Hospital of Guangdong Province, "Most of these patients start with sore throat, stuffy nose and runny nose, and most of them also have fever symptoms, but high fever and muscle soreness are rare. Most of them come to the hospital after they have tested positive antigens at home. At present, there are three or four patients in the respiratory inpatient ward, who are seriously infected with COVID-19 after suffering from basic diseases. Generally, if the fever lasts for more than three days, we recommend checking chest CT, and some patients have pneumonia table For severe cases, hospitalization is recommended The Respiratory Department of the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine also received many patients who repeatedly infected COVID-19. Liu Jianbo, chief physician of the respiratory department of the hospital, told the reporter: "At present, 'two positive' cases are quite common, but there are also 'three positive' cases. The mechanism of such repeated infection of COVID-19 is very complex. It is speculated that it is mainly because some people have not established an effective immune barrier after infection, or because the protective antibody has not been maintained for a long time, but the specific mechanism needs further research." Situation: maintain low prevalence, The symptoms of repeated infection are mild. Will the overall situation of COVID-19 low prevalence change nationwide? According to the information released by the China Center for Disease Control and Prevention, from August 1 to August 31, 2023, 31 provinces (autonomous regions, municipalities directly under the Central Government) and Xinjiang Production and Construction Corps reported 9608 valid genome sequences of COVID-19, all of which are Omikron variants, covering 106 advanced branches. The main prevalent strains are XBB series variants, with the top three being XBB.1.9 and its sub branches, XBB.1.22 and its sub branches XBB.1.16 and its sub branches. Due to the current mystery