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Confirmed and probable wound botulism cases, San Diego County, California, September 2017 to April 2018

Cases by epidemiologic week of symptom onset. (Source: Peak CM, Rosen H, Kamali A, et al. Wound botulism outbreak among persons who use black tar heroin - San Diego County, California, 2017-2018. MMWR Morb Mortal Wkly Rep 2019;67[5152]:1415-8. Public domain.)