We reviewed medical records, conducted active case search and interviewed cases or guardians. A suspected case was any person from the affected communities of Pemba and Sinazongwe, presenting with fever and maculopapular rash and; cough, coryza or conjunctivitis since July 26th 2022. A confirmed case was a suspected case with positive IgM antibodies or epidemiologically linked to a lab-confirmed case. A measles death was defined as any death that met the case definition with or without co-morbidities. We calculated the case fatality rate (CFR) and applied logistic regression to calculate the odds of being vaccinated among cases, with a 95% confidence interval (CI).