Kerala recorded the highest number of swine flu cases last week at 266 followed by Maharashtra at 36, officials in the ministry of health said Monday.
With the monsoon approaching most parts of the country, authorities remained worried as rains accelerate the spread of the virus.
A total of 345 new cases and 17 deaths were reported from across the country last week.
According to officials, swine flu cases in Kerala are so far concentrated in two districts -- Thiruvananthapuram and Kollam.
The virus claimed seven lives in the state this week.. Health ministry officials say swine flu vaccines and Tamiflu have been dispatched in sufficient quantities to Kerala.
The second largest number of infections were reported from Maharashtra which had 36 new cases of swine flu this week.
Seven deaths have been reported from Maharashtra while Andhra Pradesh has reported two. No deaths were reported from Karnataka, another badly-affected state.
No fresh case has been reported from Delhi this week.