Influenza activity is rising across China, with southern provinces reporting a 24.9% positivity rate for influenza-like illness as of late September 2026. Data from the Chinese Center for Disease Control and Prevention indicates that influenza viruses are the most prevalent respiratory pathogens, followed by COVID-19 and rhinovirus. Experts note that this season is characterized by the co-circulation of Influenza A and B, with the H3N2 subtype currently serving as the primary driver of infections.
Rising Influenza Positivity Rates
Monitoring data from the Chinese Center for Disease Control and Prevention shows a clear upward trend in influenza activity nationwide. Across sentinel hospitals, the positivity rate for influenza viruses among patients presenting with influenza-like symptoms has reached 19.8%. Regional data highlights a sharper impact in southern provinces, where the positivity rate is 24.9%. This means that approximately one in every four patients seeking care for respiratory symptoms in these areas is testing positive for influenza.
Current Pathogen Circulation Patterns
While influenza remains the dominant virus, surveillance data confirms a multi-pathogen environment. Among outpatient and emergency department visits, the leading pathogens are influenza (19.8%), SARS-CoV-2 (12.5%), and rhinovirus (7.3%).
For patients requiring hospitalization due to severe acute respiratory infections, the types of circulating pathogens vary slightly. The top three identified respiratory viruses in these severe cases are:
- Influenza virus (6.6%)
- SARS-CoV-2 (5.5%)
- Human metapneumovirus (4.5%)
Clinical Presentation and High-Risk Groups
Medical experts report that this season’s influenza activity has arrived earlier than in previous years. The current circulating strains differ from those seen at the start of 2026, with the Influenza A (H3N2) subtype identified as the primary strain.
Common clinical manifestations reported by patients include high fever, significant muscle aches, sore throat, and nasal congestion. While the virus can affect individuals of any age, health authorities categorize the elderly, young children, and individuals with chronic underlying health conditions as the populations at highest risk for severe complications.
Reports of School and Workplace Disruptions
Public reports from cities including Shenzhen indicate that the current wave of infections is impacting community settings, including schools and workplaces. There have been instances where classrooms have shifted to home-based learning following multiple confirmed cases of Influenza A among students. Reports from the public also describe prolonged recovery times, with some individuals experiencing symptoms—such as persistent coughing, fatigue, and throat discomfort—lasting for over a week.
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