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.
Cook County is a county in the United States state of Illinois. As of the 2010 census, the population was 5,194,675. With more than 40 percent of all Illinois residents, it is the most populous county in Illinois and the second-most populous county in the United States after Los Angeles County, California. Its county seat is Chicago, the third-most populous city in the United States.