This article was published in Infectious Diseases of Poverty by Jian Wang, Jiang Wu, and Min Lv and their teams from the Beijing Center for Disease Prevention and Control. The study established baseline data on pneumococcal carriage in Hainan Province prior to the introduction of PCV13 into the National Immunization Program. The team conducted a cross-sectional study to map the nasopharyngeal carriage of pneumococci in four cities in Hainan, providing critical evidence for future vaccine effectiveness evaluation.
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.