A woman walks outside of a COVID-19 testing center at the Incheon International Airport In Incheon, South Korea, on Feb. 10, 2023. Officials at the Korea Disease Control and Prevention Agency said Wednesday, April 5, that wastewater surveillance will potentially provide a cheaper and more sustainable tool in the country’s pandemic response. They say it could also improve the detection of other outbreaks, such as influenza, norovirus or drug-resistant bacteria. (AP Photo/Lee Jin-man, File)
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