The pig farming industry has been persistently affected by viral diseases [70], with type I interferon(IFN) serving as a crucial cytokine in the antiviral response within the host, which is able to activate a second round of autocrine and paracrine signals, that allows infected and surrounding cells to activate anti-viral programs mediated by Interferon Stimulated Genes [71]. This evidence concerns the gene IFNA1 and viral load.