CHOP physicians warn World Cup crowds could heighten infectious disease risk in Philadelphia

Children’s Hospital of Philadelphia (CHOP) physicians are warning that the upcoming World Cup matches in Philadelphia could heighten the risk of infectious disease outbreaks. Six matches will be held in the city from June 14 to July 4, raising concerns about measles and pertussis due to vaccine hesitancy and international travel. Measles is a primary concern because of its high contagion rate, with CHOP clinical pediatrics professor Katie Lockwood stating that unvaccinated individuals in a room with measles have a 90% chance of contracting it. The virus can linger in the air for up to two hours, increasing transmission risks in crowded settings like stadiums. CHOP’s senior medical director of infection prevention, Ericka Hayes, linked the rising risk to under-vaccination in the U.S., citing recent measles outbreaks in Texas and South Carolina. She noted that while international travel typically brings isolated cases, under-vaccinated populations make outbreaks more likely. Pertussis, another vaccine-preventable illness, poses risks for young children. Lockwood urged families to ensure vaccinations are up to date, especially among adults who may have overlooked routine immunizations. To combat potential outbreaks, Philadelphia will expand wastewater testing to track airborne illnesses like measles, flu, and respiratory diseases. CHOP attending physician Sesh Sundararaman emphasized that wastewater surveillance, proven effective during the pandemic, can detect diseases before clinical symptoms appear. The city will also strengthen contact tracing to identify and isolate infected individuals quickly. Hayes praised Philadelphia’s collaboration with hospitals and clinicians in responding to potential cases, ensuring rapid action if outbreaks occur. Respiratory illnesses remain the top concern for large gatherings like the World Cup, with doctors monitoring for imported diseases from the Southern Hemisphere’s winter season.