Some researchers suspect sauna heat reduces symptoms because it improves drainage, while others speculate that the high temperatures help weaken cold and flu viruses. Why this might prevent sickness in the first place, however, is unclear. But research suggests an effect. -The Claim: Sitting in a Sauna Can Relieve Cold Symptoms
MY COMMENT: I've got a cold-no fever but I am really stuffed up. Headed out for a slow run, then into Camp Humphreys to toast in the Super Gym sauna!