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Year Number of Results
2005 1
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2015 2
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2025 9

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Page 1
Evaluating the Test-Negative Design for COVID-19 Vaccine Effectiveness Using Randomized Trial Data: A Secondary Cross-Protocol Analysis of 5 Randomized Clinical Trials.
Andrews LIB, Halloran ME, Neuzil KM, van der Laan L, Huang Y, Andriesen J, Patel M, Fisher LH, Janes H, Rouphael N, Walsh SR, Theodore DA, Tieu HV, Sobieszczyk M, El Sahly HM, Baden LR, Falsey AR, Campbell TB, Kelley CF, Healy CM, Immergluck L, Luft B, Hirsch I, de Bruyn G, Truyers C, Priddy F, Sumner KM, Flannery B, Follmann D, Gilbert PB; COVID-19 Prevention Network (CoVPN). Andrews LIB, et al. JAMA Netw Open. 2025 May 1;8(5):e2512763. doi: 10.1001/jamanetworkopen.2025.12763. JAMA Netw Open. 2025. PMID: 40434773 Free PMC article.
Safety of RTS,S/AS01E malaria vaccine up to 1 year after the third dose in Ghana, Kenya, and Malawi (EPI-MAL-003): a phase 4 cohort event monitoring study.
Haine V, Oneko M, Debois M, Ndeketa L, Agyapong PD, Boahen O, Harrison SBE, Adeniji E, Kaali S, Kayan K, Owusu-Agyei S, French N, Kariuki S, Devadiga R, Ogutu B, Ansah NA, Orsini M, Ansah PO, Maleta K, Ong'echa JM, Phiri VK, Mzanga P, Jere TM, Azongo DK, Mategula D, Orimbo J, Oduro AR, Otieno W, Kaburise MB, Ababio LO, Sifuna PM, Amoit SK, Olewe F, Oyieko JN, Achieng Oguk E, Guerra Mendoza Y, Awuni D, Sing'oei V, Onyango I, Schuerman L, Ochieng BO, Okoth GO, Nyangulu W, Cherop RY, Odera-Ojwang P, Cravcenco C, Chipatala R, Roman F, Savic M, Asante KP. Haine V, et al. Among authors: ansah na. Lancet Glob Health. 2025 Jun;13(6):e995-e1005. doi: 10.1016/S2214-109X(25)00096-8. Epub 2025 Apr 24. Lancet Glob Health. 2025. PMID: 40288377 Free article. Clinical Trial.
Admixture into and within sub-Saharan Africa.
Busby GB, Band G, Si Le Q, Jallow M, Bougama E, Mangano VD, Amenga-Etego LN, Enimil A, Apinjoh T, Ndila CM, Manjurano A, Nyirongo V, Doumba O, Rockett KA, Kwiatkowski DP, Spencer CC; Malaria Genomic Epidemiology Network. Busby GB, et al. Elife. 2016 Jun 21;5:e15266. doi: 10.7554/eLife.15266. Elife. 2016. PMID: 27324836 Free PMC article.
Lessons learnt during establishment of COVID-19 active vaccine safety surveillance in nine African countries.
Cutland CL, Gutu K, Yun JA, Izu A, Mahtab S, Peter J, Ansah NA, Obaro S, Tilahun B, Jambo K, Sow S, Kagucia EW, Chicumbe S, Dlamini T, Browne M, Clothier H, Griffin J, Jiang Y, Lee A, Ghebreab L, Madhi SA, Black SB; Active vaccine safety surveillance team. Cutland CL, et al. Among authors: ansah na. Vaccine. 2025 Aug 30;62:127441. doi: 10.1016/j.vaccine.2025.127441. Epub 2025 Jul 4. Vaccine. 2025. PMID: 40617089 Free article.
Incidence rates of malaria, meningitis, and mortality in children younger than 5 years: a prospective cohort study in Ghana and Kenya before the roll-out of the RTS,S/AS01E malaria vaccine from 2016 to 2022.
Asante KP, Bozonnat MC, Savic M, Owusu-Agyei S, Kaali S, Otieno W, Boahen O, Tivura M, Otieno L, Agyapong PD, Ansah PO, Sing'oei V, Oyieko J, Adeniji E, Ansah NA, Harrison SBE, Oguk E, Dosoo D, Schuerman L, Kaburise MB, Awuni DA, Kayan K, Cravcenco C, Roman F, Haine V. Asante KP, et al. Among authors: ansah na. Lancet Glob Health. 2025 May;13(5):e859-e869. doi: 10.1016/S2214-109X(25)00022-1. Lancet Glob Health. 2025. PMID: 40288396 Free article.
23 results