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Dear Dr. Roach: I am a baby boomer who was born in 1949. I was vaccinated against polio as soon as it was available, and I was most likely exposed to measles and whooping cough. It was during the ...

Dear Dr. Roach: I am a baby boomer who was born in 1949. I was vaccinated against polio as soon as it was available, and I was most likely exposed to measles and whooping cough. It was during the ...