Chickenpox (varicella), a viral illness characterized by a very itchy red rash, is one of the most common infectious diseases of childhood. Children who get chicken pox generally develop lifetime immunity and may not be affected later on. It is spread by droplets from a sneeze or cough, or by contact with the clothing, bed linens or oozing blisters of an infected person. The inception of symptoms of chickenpox happens 10 to 21 days after contact. The disease is most contagious a day or two before the rash appears and until the rash is completely dry and scabbed over. The rash is red spots that are very itchy and maybe painful. Chickenpox typically requires no medical treatment. The doctor or general physician won't prescribe antibiotics to treat it. However, antibiotics may be required if the sores become infected by bacteria. However, the doctor may prescribe medications to shorten the duration of the infection and to help reduce the risk of complications. Treatment for skin infections and pneumonia may be with antibiotics. Treatment for encephalitis is usually with antiviral drugs. Hospitalization may be necessary for severe and complicated cases. Chicken pox in adults is more complicated and may require medicines to recover. Immunoglobulin is a treatment given by injection that can help prevent severe chickenpox if you've been exposed to someone with the infection but don't have any symptoms yet. There is an effective chicken pox vaccine that protects against the virus that causes chickenpox. It has become part of the routine childhood immunization program.