Summarize this article:

The virus that causes warts can spread when skin cells are shed off of them. This means that you can get it from touching someone else's warts.  If you do touch a wart, wash your hands afterword. This can wash away the virus before it enters your skin through a tiny cut or abrasion.  If you have a wart, it is important to wash your hands after treating them. This will help you prevent spreading the warts to other people. If you have a wart, you should cover it with a bandage, tape, or a glove. Covering your warts will minimize the chance of you spreading them to other people. If you have palmar warts on your palms, avoid shaking hands with people when you meet them without having the warts covered. There are a variety of ways you can get the virus that causes warts from other people without having direct contact with their skin. For example, you can get warts from using personal products, such as razors or towels, that have previously been used by people with warts. Also, wear flip flops or shoes in areas where the wart virus can thrive. For example, always wear them in locker rooms and public showers. The virus that causes warts thrives in warm, wet areas, so these places are natural breeding grounds for it.

Summary:
Don't touch warts. Cover warts. Protect yourself.