Effectiveness of a pay-it-forward intervention compared with user-paid vaccination to improve influenza vaccine uptake and community engagement among children and older adults in China: a quasi-experimental pragmatic trial.
Dan Wu, Chenqi Jin, Khaoula Bessame, Fanny Fong-Yi Tang, Jason J Ong, Zaisheng Wang, Yewei Xie, Mark Jit, Heidi J Larson, Tracey Chantler, Leesa Lin, Wenfeng Gong, Fan Yang, Fengshi Jing, Shufang Wei, Weibin Cheng, Yi Zhou, Nina Ren, Shuhao Qiu, Jianmin Bao, Liufen Wen, Qinlu Yang, Junzhang Tian, Weiming Tang, Joseph D Tucker
The Lancet. Infectious diseases 2022;22(10):1484-1492