B00-B09: Viral infections characterized by skin and mucous membrane lesions
B01: Varicella [chickenpox]
Varicella, also known as chickenpox, is a common infectious disease caused by the varicella-zoster virus. The condition is typically characterized by the sudden onset of a mildly uncomfortable, itchy rash consisting of small, fluid-filled blisters. These blisters often first appear on the face and trunk and can spread to nearly all parts of the body. Accompanying symptoms can include fever, fatigue, and loss of appetite. Chickenpox is highly contagious and is usually transmitted through direct contact with the rash, or indirectly through the air when an infected person coughs or sneezes. The infection generally lasts for about 5-10 days and then typically resolves on its own. Most individuals gain lifelong immunity after recovery, though the virus remains dormant in the body and can reactivate in later years, leading to shingles.
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