July 17 (UPI) -- Insomniacs have a much higher risk for depression if they have chronic inflammation, a new sleep lab experiment says. Seniors with insomnia were three times as likely to report symptoms of depression if they'd been dosed with a substance that promotes inflammation, according to results published Wednesday in JAMA Psychiatry . "Insomnia not only robs older adults of rest but also primes their immune system to make them uniquely vulnerable to depression when faced with