Overview
- Eight members of the Paris-based Chœur d’Enfants d’Île-de-France fell ill with seizure-like symptoms during a free July 22 concert at St. Paul’s Parish in Harvard Square.
- Cambridge Fire Department hazmat crews conducted thorough air-quality testing and ventilated the building after initial readings showed no hazardous materials.
- All eight children, aged 11 to 13, were evaluated, treated on scene, and released from local hospitals by July 23 in stable, non–life-threatening condition.
- Follow-up analysis identified cleaning agents used shortly before the performance as the most plausible cause of the sudden symptoms.
- The venue remains cleared and under formal investigation as officials work to confirm the precise trigger and review safety protocols.