Try connecting a working phone directly to the telephone wall jack and check for a dial tone â. if you do not hear a dial tone, please contact your telephone company to check the line. Make sure you connect the HP Officejet/Officejet Pro device to an analog phone line, or you. cannot send or receive faxes.
Vitiligo is an autoimmune condition that causes depigmentation of sections of skin. It occurs when melanocytes, the cells responsible for skin pigmentation, are damaged or destroyed by the autoimmune attack.Vitiligo tends to appear in symmetric patches sometimes covering large areas of the body.t occurs when melanocytes, the cells responsible for skin pigmentation, are damaged or destroyed by the autoimmune attack. Vitiligo tends to appear in symmetric patches sometimes covering large areas of the body.
URL of this page: //medlineplus.gov/ency/article/000816.htm. An autoimmune disorder occurs when the body's immune system attacks and destroys healthy body tissue by mistake. There are more than 80 types of autoimmune disorders. The blood cells in the body's immune system help protect against harmful substances. Examples include bacteria, viruses, toxins, cancer cells, and blood and tissue from outside the body. These substances contain antigens.