COVID as of now. "When cases reduce then sensitivity increases because most of the COVID cases are asymptomatic. If there is a new variant emerging, sensitivity increases, even if the number of cases is less," Dr Arora told ANI.
The environmental surveillance also helps to pick up any mutation or new variant circulation in the population, and any geographical trends in the infection scenario.
Meanwhile,The World Health Organization (WHO) has indicated that “there is no evidence to date that COVID-19 virus has been transmitted via sewerage systems, with or without wastewater treatment." Also, India saw a single day rise of 1,109 new coronavirus infections taking the total tally of COVID-19 cases to 4,30,33,067, while the active cases have further declined to 11,492 , according to the Union Health Ministry data updated on Friday.
The death toll has climbed to 5,21,573 with 43 fresh fatalities, the data updated at 8 am stated. The active cases comprised 0.03 per cent of the total infections, while the national COVID-19 recovery rate remained at 98.76 per cent, the health ministry said.