'Swine Flu' Strain Has Passed Between Humans & Pigs Hundreds of Times

• Dennis Thompson HealthDay Reporter
• July 28, 2023
• Full Page

It's well known that some viruses make the leap from animals to humans, but a new study shows the influenza strain responsible for the 2009 H1N1 pandemic has been particularly prolific in hopping between species.

That strain, called pdm09, has passed from humans to swine...