SARS-CoV-2 Neutralizing Antibodies in Three African Countries Following Multiple Distinct Immune Challenges oleh Diary Juliannie Ny Mioramalala, Rila Ratovoson, Paul Alain Tagnouokam-Ngoupo, Hermine Abessolo Abessolo, Joseph Marie Mindimi Nkodo, Georges Bouting Mayaka, Pierre Claude Tsoungui Atangana, Fanirisoa Randrianarisaona, Pulchérie Pélembi, Romaric Nzoumbou-Boko, Cathy Sandra Goimelle Coti-Reckoundji, Alexandre Manirakiza, Anjanirina Rahantamalala, Rindra Vatosoa Randremanana, Mathurin Cyrille Tejiokem, Matthieu Schoenhals