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Definition of Morbidity and Mortality Weekly Report
Medically reviewed by Min Clinic Staff | Updated: January 2026
Morbidity and Mortality Weekly Report: Known for short as MMWR, this is a key weekly scientific publication prepared and published by the US Centers for Disease Control and Prevention (the CDC).
MMWR contains data and reports on specific health and safety topics. The data are on specific diseases as reported by state and territorial health departments. The reports are on infectious and chronic diseases, environmental hazards, natural or human-generated disasters, occupational diseases and injuries, and intentional and unintentional injuries. Also included in MMWR are reports on topics of international interest and notices of events of interest to the public health community.