Child (girl) is suffering from varicella (fever rash). And child’s aunt is pregnant. When is it earliest that the child can meet her aunt –
**Core Concept**
Varicella (chickenpox) is a highly contagious viral infection caused by the varicella-zoster virus (VZV), leading to a characteristic fever rash. In pregnant women, VZV infection can cause severe complications, including congenital varicella syndrome in the fetus. Therefore, it is essential to determine the safest time for the child to meet her aunt, who is pregnant.
**Why the Correct Answer is Right**
The correct answer is based on the risk of congenital varicella syndrome. If the aunt is pregnant, the risk of congenital varicella syndrome is highest if she contracts VZV during the first 20 weeks of gestation. Since the child has varicella (fever rash), it is assumed that she has been infected with VZV. Therefore, the aunt should wait until the child has completed the incubation period of varicella, which is usually around 10-21 days. However, the exact timing depends on the day the aunt became pregnant.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide enough information about the timing of the aunt's pregnancy.
**Option B:** This option is incorrect because it is too vague and does not take into account the risk of congenital varicella syndrome.
**Option C:** This option is incorrect because it does not provide a specific time frame for the aunt to meet the child.
**Clinical Pearl / High-Yield Fact**
The risk of congenital varicella syndrome is highest if the aunt contracts VZV during the first 20 weeks of gestation. It is essential to determine the exact timing of the aunt's pregnancy to advise on the safest time for the child to meet her aunt.
**Correct Answer:** D.