TLR7 and viral infectious disease: Certain immunological factors such as microRNAs (miRs), interferon (IFN)-α, IFN-β, and IFN-λ, forced expiratory volume in one second (FEV1), interleukin (IL)-11, nuclear factor-kappa B (NF-κB), and toll-like receptor 7 (TLR7) aid in the pathogenesis that leads to different viral Infections [21,22,25,27,28].