the skin of a child affected by chickenpox, vesicles at different stages of development.

acne back blister blisters care chicken chickenpox closeup contagious contagiousness dermatology disease diseases health illness immunity infection inflammation itching itchy macro measures medical medicine patient pediatrics pimples pox preventive rash scabbing scratch scratching sickness skin smallpox spots symptom symptoms treatment varicella vertical vesicles virus white