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.
Illinois Population Up 3.3 Percent in 2010 Census. Illinois Remains 5th Largest State in Nation, Cook County Remains the 2nd Largest County in the Nation, Chicago Remains 3rd Largest City in the Nation. Illinois 2010 census results show over 12.8 million (12,830,632) people live in Illinois, up 3.3 percent since 2000.