Unfortunately, it is not clear whether a carrier must have active, visible lesions in order to be contagious. (texaswestveterinarian.com)
Because the disease attacks the skin and creates clearly visible lesions, people who live with it often endure rude comments, rejection, and discrimination by those who don't understand the condition. (health.com)
It is not known whether the infected dog must actually show visible lesions to be contagious, nor how long after regression of lesions contagion is still of concern. (marvistavet.com)