A nurse is evaluating teaching about infection control with the caregiver of a school-age child who has rubella. Which of the following statements by the caregiver indicates an understanding of the teaching?

The correct answer is Choice A. Choice A rationale: Rubella remains contagious from 7 days before to 7 days after rash onset. Keeping the child home for 7 days after the rash disappears prevents transmission and aligns with droplet isolation protocols. Choice B rationale: Walking in shared spaces increases exposure risk. Rubella spreads via respiratory droplets, and hallway contact may expose others before full isolation is complete. Choice C rationale: Contacting a pregnant friend risks fetal exposure. Rubella is teratogenic and can cause congenital rubella syndrome if transmitted during pregnancy, even before rash onset. Choice D rationale: Closing the door alone does not meet droplet precaution standards. Effective isolation requires limiting visitors, using masks, and controlling respiratory droplet spread