35) Hailay Gesesew, Digsu Koye, Dagnachew Fetene, Yohannes Kinfu, Ayele Geleto, et al., … Akilew Adane. Risk factors for COVID infection, severity and related deaths in Africa: a systematic review. BMJ Open; 2021, 11(2): e044618. [Field Specific journal rank= 434/2501, IF=2.9, Q1]