The three stages of infectious disease transmission include: 1) exposure; 2) infection; and 3) death.

Upon approaching a house on a "sick person" call, you find something odd but unidentifiable about the behavior of the man greeting you at the door. It makes you feel uneasy. There are no weapons visible and no obvious signs of danger. The person tells you his girlfriend is down the hallway in the bedroom and he doesn't know what is wrong with her. You should:

A) ask the man to walk in front of you. B) return to the vehicle and request law enforcement. C) tell the man you will need him to wait on the porch for the ambulance and ask him to direct you to the hallway. D) tell the man that you will need to wait with him on the porch until the ambulance arrives.

Which of the following is a commonly used intravenous device that is sometimes used in the collection of blood from patients who are difficult to collect blood by conventional methods?

A) BMP LeukoChek B) BD Microtainer C) butterfly needle D) Seraket