Rubella virus belongs to which family ?
**Core Concept**
The Rubella virus is a member of the Togaviridae family, which is a group of enveloped, positive-sense RNA viruses that primarily cause mild to severe diseases in humans. This family is characterized by its unique togavirus morphology and replication mechanism.
**Why the Correct Answer is Right**
The Togaviridae family includes the Rubella virus, which causes German measles, a highly contagious viral disease characterized by fever, rash, and lymphadenopathy. The virus replicates in the lymphoid tissues and causes viremia, leading to the spread of the disease. The Rubella virus is transmitted through respiratory droplets and is highly contagious during the prodromal phase.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Rubella virus is not a member of the Picornaviridae family, which includes viruses such as Poliovirus and Hepatitis A virus.
**Option B:** This option is incorrect because the Rubella virus is not a member of the Coronaviridae family, which includes viruses such as SARS-CoV and MERS-CoV.
**Option C:** This option is incorrect because the Rubella virus is not a member of the Paramyxoviridae family, which includes viruses such as Measles virus and Mumps virus.
**Clinical Pearl / High-Yield Fact**
The Rubella virus is highly contagious during the prodromal phase, which is characterized by fever, sore throat, and lymphadenopathy. This phase occurs 1-3 days before the appearance of the rash and is the most critical period for transmission.
**Correct Answer:** C. Togaviridae.