The CCP antibody test helps to diagnose RA and can be useful in identifying people with a more rapidly erosive form of the disease. RA is a chronic, systemic autoimmune disease that causes inflammation, pain, stiffness, and destructive changes in the hands, feet, and other joints throughout the body.
As you can see from the map above, most of the Illinois population is based in the North East of the state. Chicago, home to 2,695,598 people, remains the largest city in Illinois. It dwarfs the state's other cities â the next largest is Aurora, with 197,899 people.
â¢ After declining by more than 220,000 between 1980 and 1990, population in the. City of Chicago rose 4%, or 112,000, to 2.9 million in the 2000 census. â¢ Table 2 lists the 10 largest counties; the 10 fastest growing counties; the 10 largest. cities in Illinois; and the 10 fastest growing cities over the past decade.