The type of HPV that leads to plantar warts is contagious, but it doesn't affect everyone the same way. Plantar warts are most common in people ages 12 to 16 and in people with weakened immune systems [sources: Mayo Clinic, Mayo Clinic]. They're also found most frequently in people who have cuts or sores on their feet already.
So while the virus is contagious, it isn't highly so. That doesn't mean you shouldn't take it seriously -- no one's going to thank you for a wart on their foot, and you don't want to give yours a twin.
Lessen the change of contagion with these tips:
- Don't touch or pick at the wart ,and don't use anything such as a pumice stone that's touched it.
- Keep your feet clean and dry.
- Don't walk barefoot in public.
- Wear flip-flops in the gym shower.