09:32Science In ActionCovid in the sewersBBC World Service Duration: 30 minutes Fri 18th Mar 2022, 09:32 on BBC World Service Americas and the CaribbeanAvailable for over a yearListen nowCould novel forms of the virus be lurking in wastewater? Show more GenresFactualScience & NatureFormatsMagazines & ReviewsBrandScience In Action Source: BBC Online