WowEssays.com offers written essays for free for students wanting to have great examples for their papers. Please browse around and enjoy doing your homework.
Viruses are made up of proteins and are wrapped around genetic material (RNA or DNA). They can live and reproduce inside another living being. Viruses cannot multiply in the absence of their host, and many cannot survive in the extracellular environment for lengthy periods. The modifications are done by the virus in its genetic code lead to variations. These variations make the ...
