Chikungunya is a viral disease spread to people through the bites of infected female mosquitoes. The onset of this disease usually presents itself between four and eight days after being bitten by an infected mosquito. The first sign of infection is a fever, typically with debilitating joint pain. Other symptoms include muscle pain, headache, nausea, fatigue, and rash. Generally most people make a complete recovery, but in some cases, there may be persistent joint pain that can last for several months or even years. Additional complications may occur, including eye, neurological, and heart complications. Those with only mild symptoms may go undiagnosed, or may be misdiagnosed, especially in areas where dengue fever or other mosquito borne illnesses occur, as the same mosquito species transmit these diseases. Currently, there is no cure for the disease, and the main focus in on treatment and alleviation of symptoms. Chikungunya has been identified in about 40 countries, primarily in sub-Saharan Africa, South Asia, and Southeast Asia.