When was the last case of (wild virus) polio in the U.S., according to the WHO?

The layer of the integumentary system that contains the blood system is the:

a. epidermis b. dermis c. epidermis and dermis d. none of the above

A 47-year-old female presents with a single gunshot wound to the chest. You can see and hear air moving in and out of the wound. You should:

A. apply an occlusive dressing. B. apply antibiotic cream to the wound. C. stabilize the bullet. D. irrigate the wound with normal saline.