Infection caused by any one of several types of swine influenza viruses.
1
The two strains whose genes are found in the hybrid belong to influenza families known generally as North American and Eurasian pig flu.
2
But eventually an H3N2 spawn merged with a strain of Eurasian pig flu, producing the swine flu variant that's now infecting humans.
3
Dr Hunt, Killer Pig Flu is spreading rapidly worldwide.