Warts are spread from person to person. The transmission can be indirect. For instance, a child with a wart on his or her hand may touch a playground surface that is then touched by another child and the wart spreads. Or a person with a plantar wart uses a shower without wearing shower shoes and another person then uses it and develops a wart. The risk of getting a hand or foot wart from another person is small. A person's risk of getting a wart varies. Those with a weakened immune system are more susceptible. But those with healthy immune systems can also develop warts.