During the 49^thweek of 2023, there were a total of 82,244 cases of 18 kinds of legal infectious diseases reported, and 7 cases died in Beijing. The top five diseases with a large number of cases are Influenza, COVID-19, Hand, Foot and Mouth Disease, Other Infectious Diarrhea, and Viral Hepatitis, accounting for 99.5% of the total number of cases of legal infectious diseases.