deadly variant which could re-emerge. The researchers from Ben-Gurion University of the Negev (BGU) in Israel developed sensitive arrays which can differentiate variants from each other in wastewater.
And, the researchers claimed that coronavirus is still active, even when PCR and rapid testing of people declines. The researchers have observed a "disturbing interaction" between the Omicron and Delta variants in Beer-Sheva city of Israel from December 2021 to January 2022.
Until now, the researchers said, whenever a new, dominant, variant appeared, it overpowered its predecessor after a short parallel period.
However, in contrast to the expected dynamics whereupon the Delta variant diminishes as the Omicron variant increases, results received from wastewater detection indicated a cryptic circulation of Delta even with the increased levels of Omicron, they said. "According to the developed model, it can be expected that the Omicron levels will decrease until eliminated, while Delta variant will maintain its cryptic circulation," the authors of the study noted.