The Water Deer (Hydropotes inermis) is a usually solitary animal, besides the rutting months, and a good swimmer. There exist two subspecies: the Chinese Water Deer (Hydropotes inermis inermis) and the Korean Water Deer (Hydropotes inermis argyropus).
Viruses lack most of the internal structure and machinery which characterize 'life', including the biosynthetic machinery that is necessary for reproduction. In order for a virus to replicate it must infect a suitable host cell.
In general, viruses have very. small genomes. . This means they can encode a very limited number of their own. proteins. . For this reason, most viruses must use the proteins provided by their host in order to reproduce (make more viruses). In a way, viruses. act like parasites. . They bring very little with them and steal what they need from the host cell.