What is a virus?
Viruses are the smallest infectious agents known; too small to be seen with a normal microscope, an electron microscope is necessary to be able to see a virus. According to Oates, J.K. in Herpes: the facts (1983) " ... an average bacteria is roughly 1,000 nanometers in diameter, while viruses range in size from 300 to as little as 10 nanometers." and that " ... a human red blood cell, ... is between 7 and 8 thousand nanometers ... " (p. 21). Viruses are nucleic acid, RNA or DNA, coated with a protective layer of protein called a capsid. Some viruses also have an outer bag of lipo-protein called an envelope. After a virus attaches to a