Bay Area braces for rotavirus uptick as World Cup crowds arrive

Rotavirus, a highly contagious GI virus, is showing up again in Bay Area wastewater as FIFA World Cup crowds converge, with elevated readings in Redwood City, San Jose, and Vallejo after spring peaks. Health experts say mass gatherings and shared facilities can spread fecal-oral viruses, though outdoor venues may limit respiratory spread. About 260,000 travelers are expected for the World Cup, prompting public health advisories on handwashing and food hygiene. There is no cure; vaccination exists for children but has been removed from the routine schedule, which could influence susceptibility in adults as well.