Since most warts are caused by viruses, they can theoretically recur. However, thorough treatment and a strengthened immune system significantly reduce the likelihood. Infectious warts include: common warts (Verrucae vulgares), plantar warts (Verrucae plantares), flat warts (Verrucae planae), genital warts (Condylomata acuminata), filiform warts (Verrucae filiformes), molluscum contagiosum.