Health Advisory: Hepatitis A among Men Who Have Sex with Men, San Francisco An increase in hepatitis A virus (HAV) cases has been identified among MSM (gay, bisexual, and other men who have sex with men) in San Francisco. Seven cases have been confirmed since August 1, 2017. All seven cases lacked documentation of prior HAV immunization. No clear chain of transmission or common exposure among these cases has been identified, nor was international travel a risk factor. There is no genotypic or epidemiologic evidence linking these cases to the current outbreaks or clusters of HAV in homeless or illicit drug-using individuals elsewhere in California or the USA.1 However, limited genotype information suggests at least some of the cases could be linked to other HAV outbreaks among MSM in the United States and Europe. October 3, 2017 Public Health, SF Dept of Public Health HAV, Public Health Advisory, SFDPH 0 0 Comment Read More »