As dengue fever grips the country, another viral disease chikungunya is causing concern as over 1.3 million suspected cases have been reported across nine states.
Though Delhi has 28 suspected cases and seven confirmed cases, the worst hit is Karnataka with over 756,028 suspected cases and 294 confirmed cases of the disease.
Maharashtra has 262,595 suspected and 679 confirmed cases.
"The first cases were reported in December last year when we conducted surveys in Andhra Pradesh and Tamil Nadu," said N.K. Ganguly, director general of Indian Council of Medical Research.
"The total number of confirmed cases in the country stands at 1,533," he said.
"There has been such a wide-scale spread of the virus after 32 years."
Ganguly said surveillance sites have been set up and "we are taking anti-larvae measures to stop the virus from spreading."