The concentration of a virus in wastewater can paint a picture of how much COVID-19 is present in that community. Testing at airports can help provide context for how prevalent the virus is among international travelers, and provide clues as to what new variants are emerging.

Within the last week, the Center for Disease Control announced it is considering use of wastewater testing at airports, mainly on incoming international flights, to track any emerging new variants as COVID-19 surges in China. Health officials in Australia and the United Kingdom announced similar plans. {read}