Q.Write a short note on: Chikungunya (restrict the answer to 2 or 3 important sentences).

Dengue and chikungunya are both viral diseases transmitted by the same day-biting mosquito, Aedes aegypti, though caused by different viruses. Dengue (dengue virus, DENV) produces sudden high fever, severe headache, pain behind the eyes, and intense muscle/joint pain ("breakbone fever"), sometimes progressing to a more severe form with a drop in platelet count and bleeding risk; there is no specific antiviral cure, so treatment is supportive. Chikungunya (chikungunya virus, CHIKV) also causes sudden high fever but is distinguished by severe joint pain an …