+Viruses+

Summary- A virus is a sub-microscopic infectious agent that is unable to grow or reproduce outside a hot cell.

Reproduction- Viral populations do not grow through cell division, because they are acellular; instead, they use the machinery and metabolism of a host cell to produce multiple copies of themselves. A virus can still cause degenerative effects within a cell without causing its death; collectively these are termed cytopathic effects.

Diseases- Ebola- is the common term for a group of viruses belonging to genus Ebolavirus, family Filoviridae, and for the disease which they cause, Ebola hemorrhagic fever .
Aids- is a collection of symptoms and infections resulting from the specific damage to the immune system caused by the human immunodeficiency virus.
avian influenza- sometimes Avian flu, and commonly Bird flu refers to "Influenza caused by viruses adapted to birds.
SARS- Severe acute respiratory syndrome (SARS) is a respiratory disease in humans which is caused by the SARS corona virus. These are all diseases caused by viruses.