TY - UNPB
T1 - 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
AU - Udoakang, Aniefiok
AU - Sanou, Armel Moumouni
AU - Tapela, Kesego
AU - Owusu, Irene Amoakoh
AU - Boateng, Kyerewaa Akuamoah
AU - Amole, Taiwo Gboluwaga
AU - Okolie, Johnson
AU - Musa, Baba Mayaki
AU - Bala, Jamilu Abubakar
AU - Akano, Kazeem
AU - Olayemi, Ajibade Olufunke
AU - Oduro-Mensah, Daniel
AU - Achonduh-Atijegbe, Olivia
AU - Nnennaya, Ajayi
AU - Ihere, Okoro Sylvanus
AU - Azuogu, Benedict
AU - Ukpabi, Okechukwu
AU - Ojide, Kingsley Chiedozie
AU - Abu, Augustine
AU - Osoba, Moyosoore
AU - Oyejide, Nicholas
AU - Owusu, Evans Agyapong
AU - Amegatcher, Gloria
AU - Adade, Bismark
AU - Sampah, James Ekow
AU - Agyei, George
AU - Boateng, Benjamin
AU - Oduro-Obeng, William
AU - Ogoe-Anderson, Janet
AU - Amekpordi, Nicholas Aloba
AU - Alhassan, Safiatu
AU - Afrifa, David
AU - Opoku, Bismark Akwasi
AU - Folarin, Onikepe
AU - Oladele, Ayodeji Oluwafemi
AU - Abejegah, Chukwuyem
AU - Adedosu, Akinola Nelson
AU - Ahmed, Liasu Adeagbo
AU - Serme, Samuel S.
AU - Ouattara, Maurice
AU - Hien, Denise
AU - Nébié, Issa
AU - Obeng, Rachael Boateng
AU - Opurum, Precious
AU - Aliyu, Isah Abubakar
AU - Oyawoye, Fatima
AU - Ayeke, Dzidzor Yawa
AU - Ofori, Michael F.
AU - Nikiema, Achille Sindimbasba
AU - Sow, Bazoumana Bala Danouma
AU - Paré-Toé, Lea
AU - Guissou, Charles
AU - Minnah, Bismark
AU - Amponsah, Gifty
AU - Dassah, Sylvester Donne
AU - Dzabeng, Francis
AU - Abdullahi, Sharif Alhassan
AU - Garba, Nura
AU - Bala, Khadija Muhammad
AU - Zubair, Rufai Umar
AU - Haddad, Mahfuz Muhammad
AU - Amenga-Etego, Lucas
AU - Amuzu, Dominic Selorm Yao
AU - Morang’a, Collins Misita
AU - Sarpong, Kwabena A. N.
AU - Narkwa, Patrick W.
AU - Ouedraogo, Alphonse
AU - Ampofo, William
AU - Asiedu-Bekoe, Franklin
AU - Kuma-Aboagye, Patrick
AU - Duedu, Kwabena Obeng
AU - Abugri, James
AU - Mutocheluh, Mohamed
AU - Helegbe, Gideon K.
AU - Aryee, Paul Armah
AU - Duah, James
AU - Yeboah, Peter
AU - Ayivor-Djanie, Reuben
AU - Bediako, Yaw
AU - Diabaté, Abdoulaye
AU - Galadanci, Hadiza Shehu
AU - Sirima, Sodiomon
AU - Happi, Christian T.
AU - Awandare, Gordon
AU - Quashie, Peter Kojo
AU - Gyamfi, Jones
PY - 2023/10/9
Y1 - 2023/10/9
N2 - 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).
AB - 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).
KW - Seroprevalence
KW - COVID-19
KW - SARS-CoV-2 in West Africa
KW - COVID-19 Sero-survey
KW - SARS-CoV-2 Antibody Response
U2 - 10.2139/ssrn.4593226
DO - 10.2139/ssrn.4593226
M3 - Preprint
T3 - LANGLH-D-23-01530
BT - 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
ER -