Understanding Ehrlichiosis

This illness is caused by the bacteria in a tick bite. Symptoms often show up 1 to 2 weeks after you are bitten.

Understanding the Cold Virus

Colds are the most common illness that people get. Colds may be caused by over 200 types of viruses. The most common of these are rhinoviruses ("rhino" refers to the nose).

Understanding Coccidioidomycosis

Valley fever is an infection caused by a fungus that's breathed in from dust in the environment. It most often causes lung infection (pneumonia). Learn about symptoms, treatment, complications, and prevention.

Understanding Chikungunya

This illness is caused by a virus spread by the bite of an infected mosquito. Symptoms include a high fever and joint pain.

Understanding Chickenpox

Chickenpox is a viral illness that spreads very easily from person to person. The virus that causes chickenpox can stay in the body after the illness and later cause shingles.

Understanding Cervical Radiculopathy

Cervical radiculopathy is irritation or inflammation of a nerve root in the neck. It causes neck pain and other symptoms that may spread into the chest or down the arm.