Which is the nurse's priority action?

A client with a generalized rash enters the ED and states, "I know I have smallpox!".

A. Notifying the public health department of a smallpox outbreak.

B. Placing the client in a negative-pressure isolation room and shutting the door.

C. Clearing other clients from the waiting area.

D. Taking digital photos of the rash and sending them to the CDC.