Serological surveillance reveals a high exposure to SARS-CoV-2 and altered immune response among COVID-19 unvaccinated Cameroonian individuals - Arlette Flore Moguem Soubgui; Wilfred Steve Ndeme Mboussi; Loick Pradel Kojom Foko; Elisée Libert Embolo Enyegue; Martin Luther Koanga Mogtomo (Public Library of Science (PLoS), 2024)