While rarely fatal, the CDC describes the symptoms of infection as lasting a few days to a few weeks, producing `debilitating illness, most often characterized by fever, headache, fatigue, nausea, vomiting, muscle pain, rash, and joint pain’,  although some may experience `incapacitating joint pain, or arthritis which may last for weeks or months.’

via Avian Flu Diary: Study: Chikungunya’s Growing Threat To The Americas.