Iss: “Omicron variant at 95.8% on January 17, Delta at 4.2%” In Italy “on January 17, the Omicron variant was predominant, with an estimated prevalence of 95.8%, with regional variability between ’83, 3% and 100%, while the Delta was 4.2% of the sample examined (range 0% -16.7%) “. This is what emerges from the rapid survey conducted by the ISS and the Ministry of Health together with the regional laboratories and the Bruno Kessler Foundation. For the investigation, the laboratories of the Regions and Autonomous Provinces “were asked to select subsamples of positive cases and to sequence the genome of the virus. The sample requested was chosen by the Regions and autonomous provinces at random from among the positive samples, guaranteeing a certain geographical representativeness and, if possible, for different age groups – specifies the note from the ISS – In total, all the Regions and autonomous provinces and a total of 124 regional laboratories and the Military Health Laboratory participated in the survey and were sequenced 2,486 samples “.
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