Viruses

Research project by Kayleen Kinsley on the human immunodeficiency virus, including its classification, nutrition, reproduction, habitat, history and information on the disease it causes.

Comprehensive information from Wikipedia on these sub-microscopic infectious agents that are unable to grow or reproduce outside a host cell.

Article examining the evidence for how the first viruses may have appeared and how viruses, like other parasites, co-evolved with their hosts.

Viruses in the genus Tospovirus cause significant worldwide crop losses. Provides information on their biology, transmission, host range, symptoms, distribution and management strategies.