Chikungunya is a

The correct answer is (b). Chikungunya is a viral disease. It is caused by an alphavirus transmitted to people by infected Aedes mosquitoes. The most common symptoms of chikungunya are fever, severe joint pain, headache, muscle pain, joint swelling, or rash. The illness is usually mild with symptoms lasting for 2-7 days. However, some people may experience joint pain for several months or even years after infection. There is no specific treatment for chikungunya. Treatment is aimed at relieving the symptoms.

(a) Bacterial diseases are caused by bacteria. Bacteria are

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