Frontiers May 27 2026 Chikungunya ('to become contorted' in the Kimakonde language, named after the characteristic joint ache) is classified as one of the neglected tropical diseases by the World Health Organization. It's caused by a virus, spread by Aedes mosquitoes. Symptoms include high fever, muscle and back pain, headache, fatigue, nausea, and skin rash. The European Centre for Disease Prevention and Control has estimated that so far in 2026, there have been approximately 33,000