Monkeypox in Montréal: Epidemiology, Phylogenomics, and Public Health Response to a Large North American Outbreak.

Background: Monkeypox, a viral zoonotic disease, is causing a global outbreak outside of endemic areas.

Objective: To characterize the outbreak of monkeypox in Montréal, the first large outbreak in North America.

Design: Epidemiologic and laboratory surveillance data and a phylogenomic analysis were used to describe and place the outbreak in a global context.