Lucille Ball
Lucille Ball. Photo by Studio – Flickr, Public Domain, Link

Arthritis Foundation

While often referred to as if it were a single disease, arthritis is actually an umbrella term used for a group of more than 100 medical conditions that collectively affect nearly 46 million adults and 300,000 children in America alone. While the most common form of arthritis — osteoarthritis (OA) — is most prevalent in people over 60, arthritis in its various forms can start as early as infancy.