Even as Delhi grapples with dengue crisis, health experts have warned that citizens may next be confronted with the deadly swine flu, which is likely to hit the national capital with change of season. “The swine flu carrier, the H1N1 influenza virus, is prone to appear when the temperatures dip and winter arrives. The issue is that the disease spreads through air and not via a vector, as in dengue, and thus transmission is more rapid.

