Beijing has entered peak flu season, with the predominant circulating strain being Influenza A (H3N2), according to the Beijing Municipal Health Commission.

However, compared to previous epidemic seasons with the same prevalent strain, this year's epidemic intensity remains lower than historical peaks.

Among the current wave of Influenza A (H3N2) infections, adolescents have been the primary affected group, said Li Tongzeng, director of the comprehensive infection department, You'an Hospital Affiliated with Capital Medical University. He added that reports show that the 5-to-14 age group showed a significantly higher positivity rate compared to other age brackets.

The infection is gradually spreading to university students and working adults, while less active elderly individuals may become infected by younger people during the later stages of the peak, he said, emphasizing that vaccination remains the most effective way for middle-aged and older adults to avoid contracting influenza.

Compared to the common cold, Influenza A (H3N2) is more contagious and presents more pronounced systemic symptoms, often including high fever, headache and severe fatigue, with a relatively longer duration of illness.

Data from the Chinese Center for Disease Control and Prevention suggested that China was experiencing a peak season from November for respiratory infectious diseases, with the overall incidence on the rise, and with the number of flu cases expected to continue rising.