Problem:

Harriet, a 23 year old daycare worker, visits your office. She has questions about the flu vaccine and whether she should be immunized. When she started her daycare job at the end of the previous autumn, Harriet received a flu immunization.

After questioning Harriet, you find that she also lives with and cares for her mother, who is undergoing chemotherapy and radiation treatments for breast cancer. What do you tell her?

Include source of information for best answer.