Specific cell-mediated immunity in patients with epidermodysplasia verruciformis and plane warts.

The characterization of different types of human papilloma viruses made it possible to study the specific immune responses to purified viral antigens in patients with warts. The specific cell-mediated immunity was investigated by means of a leukocyte migration inhibition factor test in 9 patients with epidermodysplasia verruciformis and 4 patients with regressing plane warts. The results show a significant increase in specific cell-mediated reactivity concomitant with the regression of the warts.