<p>We conducted a descriptive study and a 1:1 unmatched case control study of 156 respondents (78 cases and 78 controls). We defined a case as a resident of Upper Muzarabani who presented with symptoms consistent with malaria and tested malaria positive on malaria rapid diagnostic test between week 1 and week 29 2023. A control was a resident of Upper Muzarabani who did not experience symptoms of malaria during the same period. We described the outbreak in time, place and person using proportions, analysed entomological and rainfall patterns to determine vector and rainfall trends. We conducted bivariate and multivariate analysis to determine human host related factors.</p>