Comments on: Prevalence and risk factors for swine influenza virus infection in the English pig population http://currents.plos.org/influenza/article/prevalence-and-risk-factors-for-swine-2be5hq4vqd6o2-1/ Wed, 16 Dec 2015 13:44:17 +0000 hourly 1 https://wordpress.org/?v=4.5.3