Real-world effectiveness of measles vaccine and associated factors among children aged 9-59 months during epidemic resurgence in the Democratic Republic of Congo: a nationwide test-negative case-control study

刚果民主共和国麻疹疫情复燃期间，9-59个月龄儿童麻疹疫苗的实际有效性及其相关因素：一项全国性阴性病例对照研究