Table 2 Detection of SARS-CoV-2 variants in wastewater surveillance
First reported in human | First outbreak | First human case* | First report in WW* | Variant | WHO label | Transmissibility | Wastewater sample type |
|---|---|---|---|---|---|---|---|
May 2020 | South Africa | January, 2020 | April, 2021 | B.1.351 | Beta | 50% | Sewage treatment facilities |
September 2020 | UK | February, 2020 | January, 2021 | B.1.1.7 | Alpha | 43–90% | Sewage |
October 2020 | India |  |  | B.1.617.1 | Kappa | – | WWTP |
October 2020 | India | March, 2020 | September, 2020 | B.1.617.2 | Delta | – | WWTP [53] |
November 2020 | USA | Â | Â | B.1.526 | Iota | 20% | WWTP |
November 2020 | Brazil | April, 2020 | May, 2021 | P. 1 | Gamma | 152% | WWTP |
November 2021 | Botswana | November, 2021 | November, 2021 | B.1.1.529 | Omicron | – | Wastewater (Florida) |
May 2021 (Bangladesh) | – | – | – | B.1.617.2 | Delta | – | – |
This study (in wastewater sample) | – | – | – | B.1 B.1.1 B.1.1.25 B.1.617.2 | Delta | – | Septic tanks Drains Surface water Pumping station |