True about chicken pox ?
**Core Concept**
Chickenpox, caused by the varicella-zoster virus, is a highly contagious exanthematous illness characterized by a prodrome of fever, headache, and malaise, followed by the appearance of itchy, vesicular skin lesions.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of chickenpox. Varicella-zoster virus infects lymphocytes and epithelial cells, leading to the characteristic skin lesions. The rash typically begins as macules, which progress to papules, vesicles, pustules, and eventually crusts over. The virus also causes a systemic inflammatory response, contributing to the symptoms of fever, headache, and malaise.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because chickenpox is not primarily caused by a bacterial infection.
* **Option B:** This option is incorrect because the rash of chickenpox does not typically start as blisters.
* **Option C:** This option is incorrect because chickenpox is not typically associated with a high risk of transmitting a life-threatening disease to immunocompromised individuals, although it can be severe in such cases.
**Clinical Pearl / High-Yield Fact**
Chickenpox is a classic example of a disease that can lead to complications in immunocompromised individuals, such as those with HIV/AIDS or taking immunosuppressive medications. It is essential to recognize the potential for severe disease in these patients and take appropriate precautions.
**Correct Answer:** Not Provided