I'm a graduate student in Arizona and our department does monthly outreach clinics that serve a lot of folks who come up from Mexico. Someone from our program fell ill on Sunday after working the clinic on Friday, and had to go to the ER the other night... we won't know for sure until this person's test results come back, but this made it quite real for me. I'm just trying to be more aware of hand washing, even more so than usual when seeing patients.

but, to perhaps lighten the mood a bit, here's a TERRIBLE joke I heard yesterday:
"Some people used to think the US would have an African-American president when pigs fly. Sure enough, 100 days into Obama's presidency: swine flu."
(groan.)