title: The HBsAg positive health worker revisited.
mesh_terms: D002353:Carrier State; D006280:Health Workforce / Q000331:legislation & jurisprudence*; D006509:Hepatitis B / Q000635:transmission; D006514:Hepatitis B Surface Antigens; D006801:Humans; D007883:Legislation, Medical; D008396:Maryland; D012306:Risk
chemical_list: D006514:Hepatitis B Surface Antigens