The Elderly Patient's Daughter Asks Why Her Father Seems to Be

The elderly patient's daughter asks why her father seems to be catching so many colds.Which response by the nurse is the best?

A) "After the age of 60, the plasma volume decreases so there is less infection fighting ability."
B) "Bone marrow activity decreases by about 50% with aging, which lowers the immune response to infection."
C) "The elderly person's blood is more prone to clotting, so infection-fighting cells don't get to the source of infection quickly."
D) "His antibody response to vaccines is overactive."

Correct Answer:

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