**Question:** The following statement about ocular effects of congenital rubella syndrome is false

A. Congenital rubella syndrome (CRS) causes blindness in infants.
B. CRS primarily affects the respiratory system.
C. The virus causing CRS is specific to humans.
D. Treatment for CRS is available once symptoms manifest.

**Core Concept:** Congenital Rubella Syndrome (CRS) is a disease caused by maternal infection with the Rubella virus during pregnancy. Rubella virus primarily affects the retina, leading to visual impairment and blindness in infants. CRS can also impact other organs like the heart, ears, and brain.

**Why the Correct Answer is Right:**
Option A is correct because congenital rubella syndrome does indeed cause ocular effects, specifically affecting the retina and leading to visual impairment and blindness in infants.

Option B is wrong because the rubella virus primarily affects the ocular system, not the respiratory system. The virus primarily targets the retina and other organs, not the lungs.

Option C is incorrect because the rubella virus is not specific to humans. It can infect various species, including monkeys and chimpanzees.

Option D is wrong as treatment for CRS is not available once symptoms manifest. Once the virus infects the fetus, there is no effective treatment to reverse the damage caused to the retina and other organs.

**Why Each Wrong Option is Incorrect:**

Option B is incorrect because the rubella virus primarily affects the ocular system, not the respiratory system. The virus primarily targets the retina and other organs, not the lungs.

Option C is incorrect because the rubella virus is not specific to humans. It can infect various species, including monkeys and chimpanzees.

Option D is wrong as treatment for CRS is not available once symptoms manifest. Once the virus infects the fetus, there is no effective treatment to reverse the damage caused to the retina and other organs.

**Clinical Pearl:**

Congenital Rubella Syndrome is a serious consequence of maternal rubella infection during pregnancy. Early diagnosis and prevention through vaccination are essential to avoid CRS. In cases where a pregnant woman contracts Rubella, timely intervention and supportive care can help mitigate the severity of the ocular and systemic effects but cannot reverse the damage once the virus has infected the fetus.