Varicella is classified under –
**Core Concept**
Varicella, also known as chickenpox, is a highly contagious infectious disease caused by the varicella-zoster virus (VZV). It primarily affects children, leading to a characteristic rash and fever.
**Why the Correct Answer is Right**
Varicella is classified under the family Herpesviridae, which includes other viruses such as herpes simplex and Epstein-Barr. The varicella-zoster virus is a double-stranded DNA virus that replicates in the skin and mucous membranes, causing the characteristic rash. The virus can also reactivate later in life, leading to shingles.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Herpesviridae is a family of viruses, and varicella is a specific virus within this family.
**Option B:** This option is incorrect because Orthomyxoviridae is a family of viruses that includes the influenza virus, not varicella.
**Option C:** This option is incorrect because Coronaviridae is a family of viruses that includes the SARS-CoV-2 virus, not varicella.
**Option D:** This option is incorrect because Adenoviridae is a family of viruses that includes several common cold viruses, not varicella.
**Clinical Pearl / High-Yield Fact**
Varicella is highly contagious, and individuals with weakened immune systems are at increased risk of severe disease. Vaccination with the varicella vaccine is recommended for all children to prevent this disease.
**Correct Answer: D. Adenoviridae is incorrect. Varicella is classified under the family Herpesviridae.**