Safety and immunogenicity of varied doses of R21/Matrix-M™ vaccine at three years follow-up: A phase 1b age de-escalation, dose-escalation trial in adults, children, and infants in... oleh Omar Ngoto, Mainga Hamaluba, Emmaloise Gathuri, Sam Provstgaard-Morys, Janet Musembi, Jeremy Aboagye, Lisa Stockdale, Racheal Roberts, Daniel Woods, Francis Ndungu, Kelvias Keter, Adrian V.S. Hill, Katie J. Ewer, Alison Lawrie, Samuel Sang, Philip Bejon, Irene Njau, Benedict Orindi, Melissa Kapulu, Edward Otieno, Mehreen S. Datoo, Duncan Bellamy, Charles Muiruri, Domtila Kimani