This document summarizes epidemiological studies on gingivitis from various locations. It reports that studies in Karachi and Hyderabad, Pakistan found high rates of gingivitis, especially in rural areas, indicating a need for improved oral healthcare access. Studies in India, Bangladesh, and Nepal also found over 50% prevalence of gingivitis in children and adults, with higher rates in rural locations. The document also notes a study in the US found higher gingivitis in males and African Americans. Additionally, a study in rural Kenya found 75% of adults had mild to moderate gingival inflammation.