Congenital rubella occurs only in which of the following situations?

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Congenital rubella syndrome occurs when the mother is infected with rubella virus during the first trimester of pregnancy. The virus can cross the placental barrier and infect the developing fetus, leading to a range of birth defects and complications. Infection during the second or third trimester may still be harmful to the fetus but is less likely to result in congenital rubella syndrome. Rubella exposure after birth may result in acquired rubella but not congenital rubella syndrome.

Congenital Rubella Occurs Only in Which of the Following Situations