流感监测最新周报：南方省份流感活动上升

Core Insights - The flu season in China is being monitored, with varying levels of activity reported in northern and southern provinces, indicating a potential increase in flu cases compared to previous years [2][3] Summary by Sections Flu Activity Monitoring - As of the 42nd week of 2025, flu activity in northern provinces is at a low level, while southern provinces are experiencing an increase, with a total of 49 reported flu-like illness (ILI) outbreaks nationwide [2] - In southern provinces, the ILI percentage reported by sentinel hospitals is 3.8%, which is lower than the previous week (4.1%) but higher than the same period in 2022 (3.2%) and 2024 (3.3%), yet lower than 2023 (5.3%) [2] - Northern provinces reported an ILI percentage of 2.7%, lower than the previous week (2.9%) and below the levels of 2022 (2.8%), 2023 (3.6%), and 2024 (3.4%) [2] - From weeks 14 to 42 of 2025, southern provinces reported 99 ILI outbreaks, which is lower than the 108 outbreaks reported in the same period of 2024, while northern provinces reported 42 outbreaks, higher than the 23 outbreaks in 2024 [2] Vaccination and Prevention - Medical experts suggest that flu cases are currently high, but it remains to be seen if they exceed previous years, and they recommend early vaccination against the flu [3] - Due to the flu virus's tendency to mutate, immunity from flu vaccines diminishes over time, necessitating annual vaccinations [3] - Vaccination is highlighted as the most effective and economical method to prevent flu, significantly reducing the risk of severe complications such as pneumonia and respiratory failure, especially in vulnerable populations like the elderly and children [3] - Additional preventive measures include maintaining a balanced diet, regular exercise, hand hygiene, proper mask-wearing, indoor ventilation, and avoiding crowded places [3]