Last year around 1,100 people died and 15,000 were infected across India by the highly contagious A H1N1 virus that spreads from human-to-human.
Cases spike in the winter months of December and January in the west and north of the country including in Rajasthan and in New Delhi.
Authorities in Rajasthan, famous for its deserts and palaces, have told doctors they must seek permission before going on leave and plan a door-to-door campaign to detect infected patients.
Health officials have also launched an awareness campaign to sensitise people about symptoms, precautions and treatment, and have screened more than 5,100 people.
“Total deaths are 40 and positive cases are 1,036 as from January 1 to 17 in Rajasthan. One of the deaths occurred on Thursday,” according to a statement by the Rajasthan health department.
One high-profile victim in Delhi this week was Amit Shah, a top aide to Prime Minister Narendra Modi, who was admitted to hospital with the virus.
Rajasthan’s Jodhpur district recorded the highest death toll with 16 fatalities and 225 people testing positive.
No travel advisory has been issued however.