Posted on April 29, 2009 H1N1 Swine Flu Antigenic Shift Here is a great diagram that explains how viruses can jump species: FromĀ Influenza Report Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to print (Opens in new window)Like this:Like Loading... Related