Phased Multi-Country Seroepidemiology Study of Over 20000 Individuals In West Africa Reveals the Dynamics of SARS-CoV-2 Exposure Driven by Delta, Omicron and Omicron Waves

Aniefiok Udoakang, Armel Moumouni Sanou, Kesego Tapela, Irene Amoakoh Owusu, Kyerewaa Akuamoah Boateng, Taiwo Gboluwaga Amole, Johnson Okolie, Baba Mayaki Musa, Jamilu Abubakar Bala, Kazeem Akano, Ajibade Olufunke Olayemi, Daniel Oduro-Mensah, Olivia Achonduh-Atijegbe, Ajayi Nnennaya, Okoro Sylvanus Ihere, Benedict Azuogu, Okechukwu Ukpabi, Kingsley Chiedozie Ojide, Augustine Abu, Moyosoore OsobaNicholas Oyejide, Evans Agyapong Owusu, Gloria Amegatcher, Bismark Adade, James Ekow Sampah, George Agyei, Benjamin Boateng, William Oduro-Obeng, Janet Ogoe-Anderson, Nicholas Aloba Amekpordi, Safiatu Alhassan, David Afrifa, Bismark Akwasi Opoku, Onikepe Folarin, Ayodeji Oluwafemi Oladele, Chukwuyem Abejegah, Akinola Nelson Adedosu, Liasu Adeagbo Ahmed, Samuel S. Serme, Maurice Ouattara, Denise Hien, Issa Nébié, Rachael Boateng Obeng, Precious Opurum, Isah Abubakar Aliyu, Fatima Oyawoye, Dzidzor Yawa Ayeke, Michael F. Ofori, Achille Sindimbasba Nikiema, Bazoumana Bala Danouma Sow, Lea Paré-Toé, Charles Guissou, Bismark Minnah, Gifty Amponsah, Sylvester Donne Dassah, Francis Dzabeng, Sharif Alhassan Abdullahi, Nura Garba, Khadija Muhammad Bala, Rufai Umar Zubair, Mahfuz Muhammad Haddad, Lucas Amenga-Etego, Dominic Selorm Yao Amuzu, Collins Misita Morang’a, Kwabena A. N. Sarpong, Patrick W. Narkwa, Alphonse Ouedraogo, William Ampofo, Franklin Asiedu-Bekoe, Patrick Kuma-Aboagye, Kwabena Obeng Duedu, James Abugri, Mohamed Mutocheluh, Gideon K. Helegbe, Paul Armah Aryee, James Duah, Peter Yeboah, Reuben Ayivor-Djanie, Yaw Bediako, Abdoulaye Diabaté, Hadiza Shehu Galadanci, Sodiomon Sirima, Christian T. Happi, Gordon Awandare, Peter Kojo Quashie, Jones Gyamfi

    Research output: Working paperPreprint

    Abstract

    Background: Africa has appeared spared from severe morbidity and mortality upon SARS-COV-2 infection. Studies have demonstrated high-level SARS-CoV-2 seropositivity in healthy Africans, which some have attributed to pre-pandemic cross-reactive antibodies.  Phased studies can link trends in SARS-CoV-2 seropositivity to transmission waves.   This study tracked trends in seropositivity across three West African countries and investigated factors associated with seropositivity, vaccine uptake and attitudes. Methods: Phased serosurveys were conducted across three West African countries: Burkina Faso, Ghana, and Nigeria. SARS-CoV-2 antibodies were detected in peripheral blood using validated immunoassay kits. Sampling periods correlated to ‘Delta’ and ‘Omicron’ waves. The primary outcome was the proportions of each population that have antibodies to SARS-CoV-2. Participants’ metadata was obtained using a semi-structured questionnaire. Findings: Participants numbered 20,748 across the 3 countries.  Across countries, SARS-CoV-2 IgG seropositivity ranged from 24.1-77.0 %. Seropositivity was higher than in previous Ghanaian ‘Alpha wave’ studies. At all sites, seropositivity increased sharply during the ‘Omicron’ wave, indicating that seropositivity was likely linked to increased transmissions. All sites demonstrated low self-reported vaccination rates, delinking seropositivity and vaccination. There was a significant positive association between seropositivity and age across all sites. Association with other demographic factors was country dependent. Most participants expressed positive opinions of vaccination; negative opinions often reflected misinformation. Significance: This, the largest population-based SARS-CoV-2 seroepidemiology study in Africa, confirms widespread exposure to SARS-CoV-2 infection in West Africa, not linked to pre-existing cross-reactivity. This study supports population-level biological protection against severe COVID-19 in West Africa. Funding: The Rockefeller Foundation, UK government Foreign Commonwealth Development Office (FCDO) and the Agence Française de Développement (AFD).
    Original languageEnglish
    DOIs
    Publication statusPublished (VoR) - 9 Oct 2023

    Publication series

    NameLANGLH-D-23-01530

    Keywords

    • Seroprevalence
    • COVID-19
    • SARS-CoV-2 in West Africa
    • COVID-19 Sero-survey
    • SARS-CoV-2 Antibody Response

    Fingerprint

    Dive into the research topics of 'Phased Multi-Country Seroepidemiology Study of Over 20000 Individuals In West Africa Reveals the Dynamics of SARS-CoV-2 Exposure Driven by Delta, Omicron and Omicron Waves'. Together they form a unique fingerprint.

    Cite this