Infections have peaked and after weeks of "slowing down", Catalonia is finally beginning to get over the most uncertain wave of covid. In the week of January 17 to 23 more than 250,000 positive cases were detected due to the rapid transmission of the virus, which mainly affected younger age groups. This is reflected in the official records thanks to the diagnostic effort in the educational environment and self-diagnosed cases in pharmacies. "The data is very clear: we have got passed the peak and this week there is already a fairly rapid drop in cases," summarises Clara Prats, a researcher in the Biocom-SC group at the UPC.