Viruses that cause the following diseases are extremely
infectious.
Chickenpox
Flu (influenza)
Herpes
Human immunodeficiency virus (HIV/AIDS)
Human papillomavirus (HPV)
Infectious mononucleosis
Mumps, measles and rubella
Shingles
Viral gastroenteritis (stomach flu)
Viral hepatitis
Viral meningitis
Viral pneumonia