25% of MSM from the San Francisco Bay Area who travel internationally were found to infected with hepatitis B (HBV)

Among a sample of men who have sex with men (MSM) from the San Francisco Bay Area who traveled internationally, 25% were infected with hepatitis B (HBV) and was higher among older men. Self-reported vaccination was less prevalent among older men. (H. Truong, T. Do, & W. McFarland, CAPS/PRC)

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