About the book
The 1918 human influenza pandemic was suggested to have been caused by an avian origin influenza virus. It was subsequently transmitted from humans to pigs and maintained in the swine population. The susceptibility of pigs to the influenza virus of both human and avian strains is due to its possession of receptors for both strains. This explains their role as a mixing vessel for influenza viruses. Pigs also play an important role in the emergence of another influenza pandemic in 2009. The triple reassortant influenza virus bearing genes of human, avian and swine influenza viruses is believed to have circulated for a while in pigs before emerging as a pandemic in humans. Influenza scientists were more fixated on avian influenza ( Highly Pathogenic Avian Influenza ) and South East Asia (China) while a pandemic emerged in swine and Mexico. Just as it happened in 1918, the susceptibility of pigs results in direct transmission of H1N1pdm09 virus to swine as widely reported in a phenomenon some authors have described as ‘reverse zoonoses’. The foregoing shows the central role of swine influenza in influenza virology and epidemiology. This book will be a collection of diverse research/investigations and reviews on swine influenza to foster new insights as we prepare for yet another dimension of the influenza epizootic and pandemic in a constantly changing environment.