common contagious diseases
The most common type of viral disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat). Other common viral diseases include: Chickenpox. Flu (influenza).Herpes. Human immunodeficiency virus (HIV/AIDS). Human papillomavirus (HPV). Infectious mononucleosis.he most common type of viral disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat). Other common viral diseases include: Chickenpox. Flu (influenza). Herpes. Human immunodeficiency virus (HIV/AIDS).