What is the most important information to obtain from a child with symptoms of Reye syndrome?

The most important information to obtain from a child exhibiting symptoms of Reye syndrome is a recent viral infection. Reye syndrome is a serious condition that primarily affects children and is often associated with the use of aspirin during a viral illness, particularly after infections such as influenza or varicella (chickenpox). Identifying a recent viral infection can help establish a potential link between the viral illness and the development of Reye syndrome.

Understanding the patient's history of recent infections not only informs the diagnosis but also aids in implementing preventive measures, as avoiding aspirin in children with viral infections can help reduce the risk of Reye syndrome. This information is crucial for healthcare providers when assessing the child's health and determining the appropriate medical response.