New Delhi: H1N1 influenza is back to haunt Delhi after three years. The disease, which gained epidemic proportions in 2009, has claimed three lives so far this year. At least 57 people have taken ill this time around, according to government data.

Path labs and hospitals say there is a sudden increase in the number of patients seeking blood tests and treatment for the disease, characterized
by a sore throat, body ache and upper respiratory infection among other symptoms.