PAISLEY DAILY EXPRESS: Live news as it happens On July 22 he went into anaphylactic shock at home in Houston.Anaphylaxis is a severe and potentially life-threatening allergic reaction affecting more than one body system such as the airways, heart, circulation, gut and skin.Symptoms can start within seconds or minutes of exposure to the food or substance you are allergic to and usually will progress rapidly.Anaphylaxis is potentially life-threatening, and always requires an immediate emergency