Laboratory tests conducted on urban wastewater by the National Network of Sewage Epidemiology show a significant increase in the average viral load in eight out of 12 cities inspected from October 11-17, over the previous week.
The samples collected showed a massive jump of 176% in Volos, 50% in Alexandroupoli and 30% in Larissa.
Attica recorded a 12% increase.
On the other hand, the viral load decreased in Rethymno (-33%), Agios Nikolaos (-50%) and Iraklio (-68%) – all of which are in Crete – and Patras (-12%).
Wastewater analysis is believed to give an early warning for upcoming epidemiological trends.