The number of swine flu patients in Delhi is rising at an alarming rate. Doctors warn that it is likely to get worse. Reeling under the monsoon, Delhi is already battling a double whammy of Dengue and Chikungunya. This year, however, there is an additional burden of H1N1 (Swine Flu). Delhi has recorded at least 1,719 cases of swine flu this year. The H1N1 virus usually spreads during colder temperatures and its early spread has taken doctors by surprise.