Let's review your calculation here:

Odds of getting the flu, feeling like absolute crap for a week, losing a week of work, being shunned by everyone I know for two or three weeks because I'm a carrier of the swine flu, but accidentally giving some of my acquaintances the flu anyway, thus prolonging the epidemic: 35%.

Okay, stop. I'm going to the pharmacy for my vaccine right now. [1]

My only fear is that I'm already too late. I'm not feeling so well today.

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[1] Not that I think it's in stock yet, or anything. But maybe I'll call them.