Effectiveness of Bacille Calmette-Guerin vaccination policies in reducing infection and mortality of COVID-19: a systematic review
接种卡介苗政策有效降低COVID-19感染率和死亡率研究的系统综述
Factors determining membership in community-based health insurance in West Africa: a scoping review
影响西非社区医疗保险参与度因素的范围综述研究