The infection rate of omicron, the highly infectious variant of COVID-19, is doubling about every two days, says Dr. Gregory Poland, an infectious diseases expert and head of Mayo Clinic's Vaccine Research Group.  "We do know from early data that this virus replicates about 70-fold faster than the delta variant. And we see manifestations of that. For example, for somebody who's previously been infected with COVID, their chance of getting reinfected with omicron is almost 5½-fold higher…

from News from Mayo Clinic https://newsnetwork.mayoclinic.org/?p=327865