[Influenza activity has fluctuated recently, and the test positivity rate in southern provinces is at a moderate epidemic level] October 15th, according to the national sentinel surveillance of acute respiratory infectious diseases released by the Chinese Center for Disease Control and Prevention today (15th), from October 5th to October 11th, currently, respiratory infectious diseases are at a low level in most parts of the country, and influenza activity has fluctuated, mainly A (H3N2) subtype and B (Victoria) influenza viruses. In addition, there is a significant difference in influenza activity levels between the northern and southern provinces. The test positivity rate in the southern provinces fluctuates at the medium epidemic level, while the northern provinces are at the low epidemic level. The Chinese Center for Disease Control and Prevention reminds that people with weak immunity, such as pregnant women, young children, the elderly and patients with chronic diseases, should receive relevant vaccines to prevent respiratory infectious diseases according to vaccination guidelines and take personal protection.