Rubbing Your Eyes and Touching Your Mouth 

It's impractical – and impossible -- to avoid touching every surface that might carry the flu virus. No matter how many handrails and doorknobs you avoid, there will be that one area you forget. And ironically, it may very well be on your own body. 

You could pick up the flu virus on your hands anytime you touch a public object like handrails, elevator buttons, shopping carts, taxi cab door handles, doorknobs and handles and the flush handle on public toilets. Instead of traversing the city in a biohazard suit, be mindful of where you place your hands on your own body. 

If you touch your eyes or mouth, you could introduce the flu virus into your body. So wash your hands often and keep your hands away from your face.