Chickenpox is a highly contagious viral infection in which a person develops extremely itchy blisters all over the body and it is common childhood disease caused by a virus in the herpes family of viruses called the varicella virus. The varicella virus can remain in the body for decades and become active again in adults, causing herpes zoster (shingles). Shingles involves the occurrence of painful skin sores along the distribution of nerves across the trunk or face. Symptoms Itchy blisters on a red base, progressing to scabs, appear along with newer blisters, mainly on the trunk, face, and scalp and last 5 to 10 days.
Sources of Chickenpox infection
Direct contact with skin sores or breathing in the varicella virus by being around someone with chickenpox who is coughing or sneezing.
A person with chickenpox can spread the virus for 1 to 2 days before the rash appears and until all the blisters have formed scabs.
There are several things that can be done at home to help relieve the symptoms and prevent skin infections. Calamine lotion and colloidal oatmeal baths may help relieve some of the itching. Keeping fingernails trimmed short may help prevent skin infections caused by scratching blisters.
The vaccination produces seroconversion in 90–100% and gives >80% of vaccinees com- plete protection, >90% protection against moderately severe and severe courses . In a more recent case-control study the protective effect in the overall observation period was 87% but fell as the time since vaccination increased (97% in the first year, 84% after 2–8 years.