Viruses.
Herpes simplex 1
Herpes simplex 2
Ebola
Rabies
Lassa Fever
Denge Fever
Human Immunodeficiency Virus (HIV)
Chickenpox
SARS
Avian Flu
Rhinovirus
Poliovirus
Human Papillomavirus
Spanish Flu
West Nile Virus
Smallpox
Norwalk Virus
Hepatitis A
Hepatitis B
Hepatitis C
Meningitis
Measles
Mumps