Some people who develop symptoms with West Nile virus complain of joint pain. The joints of the infected person may become unusually stiff and painful, and feel warm. This pain may manifest alongside the flu-like effects, though it may also develop as the singular symptom. Some people confuse the joint pain for arthritis, while physicians may confuse the symptoms for another mosquito-borne illness: chikungunya. Joint pain and swelling are more common with chikungunya than with the West Nile virus.
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