Ebola

First off, in the wise words of The Hitchhiker's Guide to the Galaxy, "Don't panic!"  The African outbreak of Ebola has resulted in one travel-related case being diagnosed in the U.S. and a few other American patients being flown to the U.S. for treatment, but according to this site from the Centers for Disease Control and Prevention, your risk of getting the disease is relatively low unless you're a healthcare worker or a close family member of an infected person:

http://www.cdc.gov/vhf/ebola/index.html

In general, if you can avoid making contact with the blood or other bodily fluids of an infected person, you should be fine.  It's flu season, so you should be avoiding sick people and washing your hands frequently anyway.  May the hand sanitizer be with you!