Abstract: Objective To analyze the epidemiological characteristics of pertussis in Hedong District of Tianjin from 2018 to 2023,and to provide reference for the prevention and control of pertussis. Methods The data of pertussis cases in Hedong District of Tianjin from 2018 to 2023 were collected,and the data were analyzed by descriptive epidemiology. Results A total of 213 cases of pertussis were reported in Hedong District of Tianjin from 2018 to 2023,with an average annual incidence of 4.43/100 000. The highest incidence rate was 183.96/100 000 at the age of 0-<1. The incidence was concentrated in 2-<15 years old(58.69%),with 6-<15 years old accounting for 40.38%. The total immunization rate of 2-<15 years old patients was 96.80%,and the immunization rate of 2-<5 years old patients was 100.00%. In the cluster of cases,the main source of infection was 2-<15 years old(71.43%),especially school-age children and adolescents aged 6-<15 years old(53.57%),and the main transmission route was“school-age children and adolescents→adults”. Conclusion The reported incidence of pertussis in Hedong District of Tianjin from 2018 to 2023 shows an overall increasing trend. Attention should be paid to the prevention and control of school-age children and adolescents with high vaccine coverage,and the whole-life cycle immunization strategy should be optimized.

Key words: Pertussis, Epidemiological characteristics, Immunization history