title: Seasonality of a large hepatitis B outbreak associated with the delta agent.
authors.forename: N C
authors.initials: NC
authors.lastname: Briggs
mesh_terms: D004196:Disease Outbreaks; D006509:Hepatitis B / Q000150:complications / Q000453:epidemiology*; D003699:Hepatitis D / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008404:Massachusetts / Q000453:epidemiology; D012621:Seasons