title: U. K. prevalence of delta infection.
mesh_terms: D006509:Hepatitis B / Q000382:microbiology*; D006716:Homosexuality; D006801:Humans; D008297:Male; D019966:Substance-Related Disorders / Q000382:microbiology; D006113:United Kingdom; D014777:Virus Diseases / Q000453:epidemiology*