Rubella is a viral infection caused by the rubella virus, which primarily affects the respiratory system and can be spread through the air or direct contact with infected individuals. While often mild in healthy adults, the infection poses significant risks when contracted during pregnancy, potentially leading to congenital rubella syndrome (CRS). The complications associated with CRS include cataracts, deafness, and cardiac defects. Due to the potential for irreversible birth defects, prevention strategies often involve vaccination, making the understanding of viral transmission and maternal immunity crucial in public health.