Chickenpox :
Chicken pox is a viral infection caused by varicella zoster virus (Human herpes virus 3) that occurs in humans at any age most commonly affecting children that presents with blisters associated with severe itching on the body. It is spread via droplets from an infected person and it is more severe in adults with wide spread rash and scars after healing due to very strong immune reaction to the virus. The blisters are typical and usually start on the trunk,scalp or face and spread to the entire body. The person affected with chicken pox has blisters, scabs and crusts at the same time and heal slowly and also associated with low grade fever, tiredness and headache. Immediate diagnosis and isolation of the infected person is necessary to prevent the spread of the infection. It usually resolves itself by 7-10 days in children and antivirals are given to adults that are affected to prevent complications