SPRINGFIELD, Illinois, Sept. 12 (TNSres) -- Southern Illinois University's School of Medicine issued the following news release: * * * Cell senescence may trigger the start of cognitive decline. Can we stop it before it starts? * * * When you catch a cold or cut your finger, the immune system begins the healing process by clearing damaged cells. As we age, that process weakens. Health problems linger as immune systems aren't quite as robust as they once were, whether it's fighting bacteria,  more