This research <a href="https://www.medrxiv.org/content/10.1101/2021.09.28.21264262v1" rel="nofollow">https://www.medrxiv.org/content/10.1101/2021.09.28.21264262v...</a> only confirms previous findings. That is, on average the PCR test Ct values are similar when tested for infection.<p>What is also known from other research is that Ct values for vaccinated decrease faster.<p>It is also known that probability that the samples grow in the cell culture is lower for vaccinated tested Ct values.