As a child, I got measles, mumps, and chicken pox. I got a vaccine for pertussis (whooping cough) and polio, thank goodness.
About 10 years ago, I went to the doctor because I couldn’t shake this cough I had. Turns out my immunity to pertussis was either gone or very weak, as I had it! It now makes me wonder if my immunity to other diseases I had as a child are still strong.
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