Virology- The study of viruses and viral diseases.
Virus- A sub-microscopic infectious agent that is unable to grow or reproduce outside a host cell.
A short clip on how HIV viruses enter a human body and then into the cells. This is one of the examples of how a virus operates but there are many other variations on how the other viruses works.

The Virus

Picture
Picture of the AIDS virus

http://health.howstuffworks.com/aids2.htm



components listed
The:
-Matrix protein
-Envelope protein
-RNA
-Lipid membrane
-Capsule protein

Types of viruses

Picture

The types of viruses as of current findings.

http://rationalrevolution.net/images/c18x2viral-types.jpg

a) Tobacco mosaic virus
b) Adenoviruses
c) Influenza virus
d) Bacteriophage