HanH., FangZ., YeX., WuH., ZuoF., ShiQ., MuJ., & XuB. (2019). Seroprevalence of antibodies for pertussis and diphtheria among people leaving or entering China: a cross-sectional study. The Journal of Infection in Developing Countries, 13(05), 394-399. https://doi.org/10.3855/jidc.10147