Investment Rating - The industry investment rating is maintained as "Outperform the Market" [2] Core Insights - The report highlights that October marks the beginning of the high incidence season for respiratory infectious diseases in China, with a notable increase in the number of patients visiting fever clinics [4][5] - Monitoring data indicates a significant rise in the positivity rate of influenza viruses, while the positivity rate for COVID-19 has been declining [7][14] - The report notes that the proportion of influenza-like illness (ILI) cases in emergency visits has increased, particularly in northern provinces, indicating a growing trend in respiratory infections [10][13] Summary by Sections Fever Clinic Data - From October 1 to October 31, the number of patients visiting fever clinics across 31 provinces fluctuated from 55,000 to 67,000, stabilizing between 60,000 and 63,000 towards the end of the month [5][4] Influenza and COVID-19 Monitoring - The positivity rate for COVID-19 among influenza-like cases decreased from 10.2% to 1.2% over the monitored weeks, while the positivity rate for influenza viruses increased significantly [7][14] National Influenza Surveillance - In the 44th week of 2025, southern provinces reported an increase in influenza activity, with a total of 347 outbreaks of influenza-like cases reported nationwide [10][13] - The positivity rates for the top three pathogens detected in emergency visits were influenza virus (17.5%), rhinovirus (12.4%), and enterovirus (6.7%) [14][15]

Core Viewpoint - The National Health Commission indicates that China is entering the epidemic season for respiratory infectious diseases due to seasonal temperature drops and increased activity of disease vectors [1] Summary by Relevant Categories Respiratory Infectious Diseases - Acute respiratory infectious diseases such as influenza, respiratory syncytial virus infections, and rhinovirus infections are showing an overall upward trend as the country enters the respiratory disease epidemic season [1] - The combination of lower temperatures, increased indoor activities, and reduced air circulation contributes to the rising risk of multiple respiratory pathogens co-circulating [1] Gastrointestinal Infectious Diseases - Norovirus infections and hand-foot-mouth disease are also prevalent during this season, with a risk of clustered outbreaks in key locations such as schools and childcare institutions [1] Vector-borne Diseases - There is a risk of imported cases of vector-borne diseases such as chikungunya and dengue fever, with local transmission risks still present in some southern provinces [1] Public Health Recommendations - The public is advised to dress warmly, ensure proper ventilation indoors, maintain good hygiene practices, and get vaccinated against influenza, especially for vulnerable groups such as the elderly and those with chronic health conditions [1]

Core Viewpoint - The article highlights a significant increase in respiratory infections among children during the autumn and winter seasons, with various pathogens circulating, particularly influenza and rhinovirus, leading to a rise in outpatient visits at children's hospitals [1][2]. Group 1: Respiratory Infection Trends - There has been a notable rise in the number of outpatient visits for respiratory infections in children's hospitals, with symptoms such as persistent cough, runny nose, and fever being common among affected children [1]. - According to the China CDC, influenza has become the leading pathogen in outpatient settings, with a positive detection rate of 17.5% for influenza-like cases [1]. - The infection rates for rhinovirus are also high, particularly among children aged 14 and below, while respiratory syncytial virus (RSV) is showing an upward trend in northern provinces [1]. Group 2: Symptoms and Treatment - Common symptoms of respiratory viral infections include fever, cough, phlegm, sore throat, sneezing, and runny nose, but different viruses exhibit distinct characteristics [2]. - RSV primarily affects infants under 2 years old, presenting with symptoms like runny nose, low fever, and cough, while severe cases may lead to respiratory distress [2]. - Influenza typically presents with more severe systemic symptoms, whereas rhinovirus infections are generally milder, resembling common colds [2]. Group 3: Treatment Guidelines - There are significant differences in treatment approaches for various viral infections; both rhinovirus and RSV lack specific antiviral medications, and treatment focuses on supportive care [2]. - For confirmed influenza cases, prompt administration of antiviral medications can effectively alleviate symptoms, but these medications are not beneficial for other viral infections [2]. - The use of antibiotics is discouraged for any viral infections, as they do not provide any benefit [2]. Group 4: Influenza Virus Characteristics - Current circulating influenza strains are predominantly the H3N2 subtype, which accounts for over 98% of detected cases [3]. - The H3N2 subtype is a common seasonal flu strain, and vaccination is emphasized as the most effective and economical method to prevent severe illness from influenza [3]. - Available influenza vaccines are effective against the currently circulating H3N2 strain [3].

Core Insights - The flu activity in China has significantly increased, with most provinces entering the flu epidemic period, particularly in regions like South China, Southwest, Northeast, and Northwest where some provinces have reached moderate epidemic levels [1][3]. Group 1: Flu Activity Trends - Sichuan Province has officially entered the flu epidemic period, with a rapid increase in case numbers [2]. - The flu epidemic this year has emerged earlier and is expected to peak above the recent average levels in Hunan Province [2]. - During the 44th week of 2025, the percentage of flu-like cases reported in emergency departments was 4.7%, with flu virus detection rates at 17.5% [2][3]. Group 2: Respiratory Virus Monitoring - A total of 347 flu-like case outbreaks were reported nationwide in the 44th week of 2025, with southern provinces reporting 350 outbreaks, significantly higher than the 120 outbreaks in the same period of 2024 [3]. - The detection rates of respiratory syncytial virus (RSV) are rising in northern provinces, while southern provinces show fluctuating declines [4]. - The positive detection rates for enteroviruses have decreased, while the rates for rhinoviruses remain stable, particularly among children aged 14 and under [4]. Group 3: Public Health Recommendations - Health monitoring in key institutions such as kindergartens, schools, and nursing homes is advised to promptly identify and manage outbreaks [6]. - The public is encouraged to take personal protective measures, including flu vaccinations for individuals aged six months and older without contraindications [6]. - Recommendations include wearing masks in crowded places and maintaining good hygiene practices to reduce the risk of infection [7].