中疾控：流感活动连续四周下降，整体仍处中流行水平

Core Viewpoint - The flu activity in China has been declining for four consecutive weeks but remains at a moderate epidemic level, according to the Chinese Center for Disease Control and Prevention (CDC) [1][2]. Group 1: Flu Activity and Monitoring - The positive rate of respiratory samples from flu-like cases in sentinel hospitals shows that the top three pathogens are influenza virus (27.4%), respiratory syncytial virus (8.8%), and rhinovirus (5.7%) [1]. - The flu activity intensity is decreasing across all provinces, with reports of school outbreaks declining for five consecutive weeks [1]. - The laboratory tests indicate that 97.3% of the positive influenza virus samples are of the H3N2 subtype [1]. Group 2: Vaccine Information and Recommendations - The flu vaccine used in China is selected annually by the World Health Organization based on global flu monitoring data, including epidemiological data and antigen analysis [1][2]. - The flu monitoring system in China supports the WHO's vaccine strain recommendations, with 665 national-level laboratories and 1,041 sentinel hospitals tracking flu dynamics and detecting new variants [2]. - Vaccination can reduce the risk of flu, alleviate symptoms, and significantly lower the risk of hospitalization, severe cases, or death in high-risk groups [2]. - Recent international studies indicate that flu vaccination can prevent 67% of hospitalizations in children, 43% of severe cases in children, and 48% of adult hospitalizations [2]. - It is recommended that all individuals over six months old, without contraindications, should receive the flu vaccine annually, especially high-risk groups such as children, the elderly, teachers, healthcare workers, and those with underlying health conditions [2].