I must admit that in the past I often considered "quickly running my hands under water, maybe with a little soap" sufficient. However, I have since learned it is not. 15 seconds is the magic number my friends, with warm water and soap. Try counting next time you wash your hands and I think you'll be surprised by how long 15 seconds will seem. But please do it so we can all stop the unnecessary spread of germs that could prove deadly to someone whose immune system is compromised.
Everyone's best defense against infection is handwashing. Do it after you use the restroom, before you handle your food, after you handle your food, after you pet animals, when you use a grocery cart, after you've handled money, and on and on. If you don't have access to a sink with soap and water, use the convenient alcohol based instant hand sanitizers. Don't leave home without one!