Why Are Doctors Always Surprised that I’m Not an Idiot?

Doc: Sometimes you have to get re-vaccinated for Hepatitis B because your immunity wanes over time. It’s like the flu shot. You have to get that every year.

Me: But that’s because the flu virus changes every year.

Doc: OMG how did you know that? Are you a nurse?

Me: No, I’m just a smart person.