Infection control.
D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission*; D017742:Dental Care for Chronically Ill / Q000331:legislation & jurisprudence*; D006801:Humans; D017053:Infection Control / Q000191:economics; D017757:Infectious Disease Transmission, Professional-to-Patient / Q000517:prevention & control*; D009864:Ontario; D016079:Refusal to Treat / Q000331:legislation & jurisprudence*