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Barry is an elderly 84 year-old patient of yours that has chronic lymphocytic leukemia. He inquires about whether he needs any vaccinations at today's visit. As his NP, you recommend which of the following?
a. Pneumococcal (Pneumovax) vaccine
b. Live attenuated influenza vaccine (LAIV)
c. Measles, Mumps, Rubella (MMR)
d. Zostavax vaccine