I'll be honest: movies about viral outbreaks are NOT my thing. WAY too real. I'm not much of a germophobe, but this sort of thing really makes me want to crawl up into a ball, silently rock back and forth, and never EVER leave my house.
That said, these movies are really good.
Contagion (Steven Soderbergh, 2011) Do NOT watch this movie unless you want to go through life with latex gloves and a doctor's mask on FOR THE REST OF YOUR LIFE. Seriously, this movie is SO scary - Gwyneth Paltrow contracts a cold on a business trip, except it's NOT a cold, but rather a SUPER contagious disease, and then everything goes to hell. This movie seriously feels all too real. A ridiculously starry cast is the least that this movie has to offer.