CD8A and viral infectious disease: Future studies should consider different models for the viral infection including the dynamics of the immune response such as CD8+T cells (Hancioglu et al., 2007; Lee et al., 2009; Miao et al., 2010; Tridane and Kuang, 2010; Dobrovolny et al., 2013), Interferon type I (Canini and Carrat, 2011; Pawelek et al., 2012; Hernandez-Vargas et al., 2014) and Natural killer cells (Canini and Carrat, 2011).