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.
Nonallergic causes of hives include infections, some drugs, some physical stimuli (such as pressure or cold), some emotional stimuli (such as stress), and some food additives. Even though acute hives usually have a specific cause, the cause cannot be identified in about half of cases.