Hashimoto's Thyroiditis. Also called Hashimoto's disease, Hashimoto's thyroiditis is an autoimmune disease, a disorder in which the immune system turns against the body's own tissues. In people with Hashimoto's, the immune system attacks the thyroid.
According to the U.S. Census Bureau, the county has a total area of 4,751 square miles (12,310 km 2), of which 4,058 square miles (10,510 km 2) is land and 693 square miles (1,790 km 2) (15%) is water.
California has the three most densely populated large urban areas in the country: Los Angeles at approximately 7000 residents per square mile, San Francisco at approximately 6300 residents per square mile and San Jose with approximately 5800 residents per square mile.