Peter Palese, Professor and Chairman of the Department of Microbiology and Infectious Diseases at Mt. Sinai, explains the current Virusâs direct derivation from that which arose in 1918, the natural âherd immunityâ that all humans share against it, and the reasons why the elderly stand at a lesser risk of contracting the contagion: http://bigthink.com/peterpalese/the-wiley-influenza-virus-porcine-and-otherwise.
