Which statement indicates that a parent understands the instructions regarding their toddler’s first MMR vaccine?

The statement indicating that a parent understands the instructions regarding their toddler’s first MMR vaccine is that they can give their child acetaminophen for discomfort associated with the immunization. This response reflects an understanding of common post-vaccination care, as it is advisable for parents to manage mild side effects, such as fever or discomfort at the injection site, with acetaminophen. This practice helps to ensure the child's comfort following vaccination.

The other statements do not accurately reflect appropriate understanding or guidance related to the MMR vaccine. Returning in 2 weeks specifically for the varicella vaccine suggests confusion, as the MMR vaccine does not typically require a follow-up appointment for the varicella vaccine, which is administered separately at another time. Avoiding play with other children for 2 days is unnecessary, as social interaction is usually fine unless a child shows symptoms indicating illness. Lastly, while mild redness or swelling at the injection site can occur, discharge might indicate a complication, which is not a normal expectation and should be monitored closely. Thus, the correct statement recognizes appropriate aftercare for managing discomfort related to the immunization.