During the week 24 to 30 January 2022, there was a downward trend, compared to the week 17 to 23 January 2022, in the average weekly viral load of SARS-CoV-2 in urban wastewater in three of the eleven (3/11) areas tested from the National Network of Sewage Epidemiology (EDEL) ΕΟΔΥupward trends in three of the eleven (3/11) regions of EDEL and stabilizing trends in four of the eleven (4/11) regions that
were audited by EDEL.
Clearly declining trends were observed in Xanthi (-29%) and Patras (-82%), while the decrease observed in Volos (-16%) was marginal.
Clearly increasing trends were observed in Ioannina (+ 30%) and Heraklion (+ 61%), while the increase was observed in the Attica Region (+ 22%). The viral load of urban wastewater remained virtually stable in Chania (-5%), Alexandroupoli (-8%), Larissa (-10%) and
Thessaloniki (-10%).
It is noted that the epidemiological indices remained at high levels for another day according to today’s report of EODY
Table 1: Percentage change in the mean SARS-CoV-2 viral load concentration in urban wastewater per 100,000 inhabitants per week 24-30 / 01/22 compared to the week 17–23 / 01/22.
* Changes of the order +/- 30% are close to the limits of laboratory uncertainty.
** It was not possible to calculate the percentage change in the weekly mean concentration of SARS-CoV-2 virus load in urban areas
wastewater of the city of Corfu, as last week, 17-23 / 01/22, no samples of urban wastewater from the city of
Corfu.
In Corfu the viral load of urban wastewater was detectable. However, it was not possible to calculate this weekly change compared to the previous week, as last week no samples of urban wastewater were examined from the city of Corfu.
Attica Region: In the last week, 24-30 / 01/22, the average weekly viral load in the urban wastewater of the Attica Region showed a marginally increasing trend, with a statistically insignificant increase (+ 22%) of the weekly average compared to the previous week, 17-23 / 01/22.
The viral load of wastewater in the Attica Region showed an increase from mid-September 2021 until the first
week of November 2021, while the remaining weeks of November 2021 until the third week of
December 2021 showed stabilizing trends at high levels, with insignificant fluctuations.
Then, the viral load of wastewater of the Attica Region showed a new large increase in the fourth week of December 2021 and the first of January 2022, recording the highest values observed to date in the wastewater of the Attica Region, showed a stabilizing trend in the second week of January 2022, downward trend in the third week of January 2022 and marginally upward trend in the last week of January 2022 ..
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