The World Health Organization says, the Afghan capital, Kabul, has been hit by a disfiguring tropical skin disease. The WHO warned that the disease, cutaneous leishmaniasis, threatens the health of 13 million Afghans, especially women and girls.Cutaneous leishmaniasis is a parasitic disease transmitted through the bites of certain species of sand-fly. It can lead to severe scarring, often on the face, and regularly goes undiagnosed and untreated. Several other major cities such as Herat, Kandahar and Mazar-e Sharif are also centres of leishmaniasis.