You need to get adequate sleep, address any emotional issues that might be causing you stress, make sure you wash you hands with soap and water frequently.  If you do feel like you are coming down with the FLU, please stay home.  I would suggest that you use Vitamin C, every four hours and have a lot of OSCILLOCOCCINUM on hand.  Take three the day that you are feeling funky, and use it for 3 more days, then stop.  Dump the capsule under your tongue, and spread the other two out over the entire day.  Drink lots of water.