NOD2 and viral infectious disease: Nucleotide-binding oligomerization domain containing 2 (NOD2) in cooperation with Toll-like receptors (TLR)—TLR2 and TLR6 offers enhanced protection against Staphylococcus aureus, while TLR2, TLR3, TLR7, TLR8, and TLR9 collectively safeguard the skin from viral infections such as those caused by herpesviruses, papillomaviruses, and poxviruses [44].