India, Aug. 22 -- Union health minister JP Nadda reviewed Delhi's swine flu surge with state officials on Friday, as the city's tally for the year touched 1,777 confirmed H1N1 cases and Delhi health minister Pankaj Kumar Singh said hospitals had been placed on alert.

Hours earlier, Aam Aadmi Party's Delhi president Saurabh Bharadwaj described the outbreak as "alarmingly high" and "spreading like corona", saying in a post on X that "once a family member gets it, almost everyone gets sick in turn".

Studies on H1N1 show that transmission dynamics of this virus are less explosive than Sars-CoV-2, which causes Covid-19. Its clinical course is typically mild, and its circulation and vaccination over the years is likely to have built some immu...