There is no definite assurance that the development of warts on the skin can be prevented. But since the human papillomavirus can be transmitted through direct contact, then washing the skin and the hands as often as possible can prevent the infection of the virus.
The HPV viruses are particularly invasive to warm and moist places like scratches and cuts on the hands, fingers, and feet.
Some of these cuts may not even be visible to the naked eye making it all the more hard for one to take the necessary preventive measures.
If there is someone within the family circle or friends that have obvious wart infections, then the only way to prevent the contamination is to be careful. Avoid touching anyone that has warts. Sharing towels, handkerchiefs, and other things that will permit transmission of the virus from one body to another should likewise be refrained.
For someone who already have wart on the skin, then the only way to prevent them from spreading to other parts of the body is to avoid scratching them.
Since some warts, especially those tiny ones can be itchy, there is a strong tendency to scratch them. In doing so, there is a great probability to transmit the virus to another part by merely scratching a wart-free area.