Jo Frost of 'Supernanny' fame discloses personal struggle with life-threatening condition

"Supernanny" star Jo Frost pleaded for community support after detailing her plight with anaphylaxis. 

Anaphylaxis is a severe, potentially life-threatening allergic reaction which can occur within seconds to minutes of exposure to an allergen, according to the Mayo Clinic. Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock – blood pressure drops suddenly and the airways narrow, blocking breathing.

Triggers vary, but more commonly include foods...