This study was conducted by Prof Weibing Wang and his team from Fudan University and published in Chinese Journal of Epidemiology. The study analyzed t factors associated with timely vaccination of pertussis-containing vaccines in children born in Shanghai from 2019 to 2023. The results showed that the average vaccination coverage rate was as high as 94.71%-99.53%, but the timely vaccination rate decreased with the increase of doses. The study concludes that pertussis-containing vaccine（DTaP-Hib and DTaP-IPV-Hib）are commonly used and substitute the NIP DTaP vaccine in Shanghai, with high coverage and timely vaccination rates, but some children experience delayed or missed vaccinations, warranting ongoing attention.
Independent and joint associations of sex and birth order with non‑national immunization program vaccine coverage among Chinese children: a cross-sectional analysis
This research conducted by Prof. Xiaolin Xu and team from Zhejiang University, was published in the International Journal for Equity in Health. Based on a 2022 survey in Zhejiang and Henan provinces, the study analyzed the independent and joint associations of sex and birth order with non-National Immunization Program (non-NIP) vaccine coverage among Chinese children aged 1–6. The results showed that birth order was an important factor influencing vaccination, with the lowest coverage observed among later-born girls, particularly third or later-born daughters.
