Impact of the COVID-19 pandemic on the timeliness of pertussis-containing vaccination: A cohort study in Shanghai, China.

ABSTRACT: The COVID-19 epidemic has significantly disrupted routine childhood immunization programs. This study assesses the impact of different COVID-19 prevalence phases on immunization coverage and timeliness in Shanghai, China. We employed a retrospective cohort design, encompassing children born between September 1, 2018, and August 30, 2023. Children were categorized into three COVID-19 phases based on their expected vaccination dates: baseline period, epidemic period, and pre/post-epidemic period. Kaplan-Meier estimators were utilized to ascertain the cumulative vaccination probabilities, with differences tested using the log-rank method. A multivariate Cox proportional hazards model was conducted to assess the impact of COVID-19 phases on vaccination timeliness. Vaccination timeliness signif

SUBMITTER: Huang Z 

PROVIDER: S-EPMC12320832 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature