Outbreaks are not pandemics, pandemics are not all OMG Everyone's Going to Die! and this is not 1918.
That said, and speaking as someone who is recovering from a thankfully mild bout of flu, I'm going to remind you of four really important, really basic steps to remember:
1. Wash your hands. Seriously. With soap and hot water and everything, especially if you're using mass transit or shared bathrooms. That's the most common way germs are transmitted, and the easiest to prevent. Wash your hands, cough into the corner of your elbow, not your hands (to prevents transferring germs that way), and wash, wash, wash. Especially if you think you've already got a bug -- even if you think it's 'just' a cold or bad allergies.
2. Sleep. How hard is that? [yeah. I know, I know.] If you're not feeling well, or you're a little tired, or maybe think your body is stressed... cancel something, and take a nap instead. Your body will be stronger and less open to infection for it.
3. If you're sick? Stay home. Don't infect your co-workers or classmates. Also, if you stay home you can sleep and recover faster. Win/win.
4. Don't panic, but don't be stupid, either. So far every case reported in the USA has been mild, but if your symptoms seem more severe than the usual, see your doctor.Is it a cold, or the flu?
And if you don't already have a flu kit -- put one together this week. An ounce of prevention, as they say...