Volume 29, Number 3—March 2023

DOI: 10.3201/eid2903.221446

Pavitra Roychoudhury1 , Jaydee Sereewit1, Hong Xie, Ethan Nunley, Shah M. Bakhash, Nicole A.P. Lieberman, and Alexander L. Greninger


We conducted a genomic analysis of monkeypox virus sequences collected early in the 2022 outbreak, during July–August , in Washington, USA. Using 109 viral genomes, we found low overall genetic diversity, multiple introductions into the state, ongoing community transmission, and potential for co-infections by multiple strains.