title: Two hepatitis C lookback exercises--national and in London.
mesh_terms: D018563:Disease Notification / Q000706:statistics & numerical data*; D005260:Female; D006526:Hepatitis C / Q000453:epidemiology* / Q000635:transmission; D006801:Humans; D017757:Infectious Disease Transmission, Professional-to-Patient; D008131:London / Q000453:epidemiology; D008297:Male; D013222:State Medicine; D006113:United Kingdom / Q000453:epidemiology