All analysed samples of wastewater that were collected last week contained novel coronavirus, with increased virus concentrations being registered in the regions of Trencin, as well as Bratislava, both western Slovakia, and Presov, eastern Slovakia, informed Public Health Authority spokeswoman Dasa Rackova. On Thursday, chief hygienist Jan Mikas said that the results of the analysis of the presence of novel coronavirus in wastewater match the situation concerning the epidemic in Slovakia. "The presence of the RNA virus was identified in all [analysed] samples," said Mikas adding that some samples still have not been fully analysed. According to the hygienist, a slight concentration increase was registered in the Zilina region. As for the Kosice region, the concentration of the virus in local wastewater has dropped, but it still remains high. Another decrease was also observed in the Trnava region. Last week, regional public health offices collected a total of 162 samples of wastewater, of which 141 contained the virus to at least some degree.