Question

which question should the nurse ask to determine if an employee should receive a flu shot?
in what year were you born?
could you be pregnant?
are you allergic to eggs?
did you get the flu last year?

Explanation:

Some flu vaccines are made using eggs. If a person is allergic to eggs, they may have an allergic reaction to the flu shot. Pregnancy status (while relevant for some vaccines) is not directly related to egg - based flu vaccines. Birth year and previous flu history do not directly determine eligibility for a flu shot in terms of contraindications related to the vaccine's composition.

Answer:

Are you allergic to eggs?