Projets 2022 E2CHOLERA (NIH) :Epidemiology and Ecology of Cholera in Africa MOBS : Mogode OCV Booster Doses Study SCORRITT : Screening For Covid 19 Using Sars-Cov-2 Antigen Rapid Diagnostic Tests (Ag-Rdts) To Detect Risk Of Disease Transmission Among Inter-City Public Bus Travellers