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Public health teams are expanding disease surveillance for the 2026 World Cup across the U.S., Canada and Mexico. The effort includes wastewater testing, social-media monitoring and data-sharing with hospitals, aiming to detect outbreaks early as millions attend the tournament.
Health officials warn crowd settings at the World Cup heighten risks of infectious diseases, with measles and flu among the leading threats. Surveillance is tight as officials monitor stadiums, airports and bars for early signs of outbreaks. Experts stress vaccination and rapid response as travel ramps up.