The spurt in the number of H1N1-affected people during this time of the year has baffled the experts. The disease usually spreads during winter season. However, erratic weather conditions are being held responsible for the spread of the H1N1 virus.
Swine flu being a viral disease, its virus is called H1N1. Its genetic analysis has shown that it originates from the animals, specially the pigs, something that makes it be called Swine flu. The virus spreads from person to person similar to that of seasonal influenza.