Wastewater testing does a good job at detecting mpox infections, U.S. health officials said in a report Thursday that bolsters a push to use sewage to track more diseases. U.S. Centers for Disease Control and Prevention researchers found that over the course of a week, there was a 32% likelihood the tests would detect the presence of at least one person infected with mpox in a population ranging from thousands to millions. Amy Kirby, who oversees the CDC’s wastewater surveillance work, said initially they didn't know if the tests would work for a rare infection like mpox.