India has reported 9,175 suspected chikungunya cases through April 2018, according to the National Vector Borne Disease Control Program of the Ministry of Health. Karnataka state has reported the most cases at 4,879, followed by Gujarat (1357) and Maharashtra (966).

Aedes aegypti/CDC
Aedes aegypti/CDC

During the past two years, India saw 62,268 (provisional) and 64,057 clinically suspect chikungunya cases in 2017 and 2016, respectively.

India: Additional Nipah death reported in Kozhikode

Chikungunya is a viral disease transmitted to humans by infected mosquitoes. It causes fever and severe joint pain, which is often debilitating. Other symptoms include muscle pain, headache, nausea, fatigue, and rash. The disease shares some clinical signs with dengue and Zika, and can be misdiagnosed in areas where they are common. As there is no cure, treatment is focused on relieving the symptoms.