Robert Timberg, author of John McCain: An American Odyssey , who has interviewed many POWs who served with McCain, said there's no evidence that he ever collaborated with the North Vietnamese. I've never known of any occasion in which Sen. McCain provided the North Vietnamese with anything of value, Timberg said.
What Causes Hives in Adults-The Immune System: What we do know is that hives in adults has a great deal to do with the immune system. Your immune system can be weakened by years of break outs or flare-ups due to disorders related to thyroid disease and even lupus.
Hives frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food. Psychological stress, cold temperature, or vibration may also be a trigger. In half of cases the cause remains unknown. Risk factors include having conditions such as hay fever or asthma.