A person, upon whom an invasive, exposure-prone procedure, as defined by the Department of Health and Environmental Control, is scheduled to be performed, is encouraged to know his HIV antibody, HBsAG, and HBeAg status and disclose the status to the health care professionals rendering care so that precautionary measures may be taken. A person, upon whom an invasive, exposure-prone procedure is scheduled to be performed, who does not know his status, is encouraged to have his blood tested for the presence of HIV or HBV so as to protect the health care professionals rendering care.