Clinicians began reporting outbreaks of apparently sexually transmitted HCV infection among HIV positive men who have sex with men (MSM) in the U.K. around 2000. But few such cases have been identified among HIV negative gay men.
HIV positive people routinely undergo liver function monitoring to detect antiretroviral drug toxicity, which also may reveal viral hepatitis. HIV negative people generally do not receive liver monitoring, leading some experts to suggest that HCV among HIV negative men was not being detected because no one was looking for it.
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