There is a real danger of another international COVID wave this summer, with the Delta variant possibly poised to make a comeback, new Israeli research suggests.
The peer-reviewed study is based on cutting-edge Israeli monitoring of sewage, which reveals not only the prevalence of coronavirus cases, but also their variant.
It showed that even at the height of the Omicron wave, the previous Delta variant hadn’t been wiped out, even though it was expected to be based on the dynamics of previous waves.
“The resulting model predicts a significant decrease in Omicron levels within the near future, diminishing until fully disappearing. Furthermore, the Delta is also expected to decrease, but at a much lower pace, thereby still maintaining a low (yet non-vanishing) level of cryptic circulation in the population, before starting to rise again due to the waning immunity.”
Image by Kajetan Obarski (Kiszkiloszki), CC BY-SA 3.0 nl