Why some researchers think the omicron variant could be the most infectious one yet
NPR, November 30, 2021
Over the past two weeks, omicron has spread to at least seven of South Africa's nine provinces, quickly overtaking the country's outbreak—and thus, it appears, outcompeting delta, says virologist Pei-Yong Shi of the University of Texas Medical Branch in Galveston. “Based on the epidemiology data, it seems like the new variant has advantages in transmitting over the previous variants,” Shi said.