http://www.newsweek.com/delta-variant-4-times-more-infectious-original-covid-1626707 > People infected with the Delta variant of COVID would go on to infect between five and eight other people on average without any measures in place, a researcher has told Newsweek. > Dr. Sonja Rasmussen is a clinical geneticist in the Department of Pediatrics and Epidemiology at the University of Florida who has studied COVID-19 throughout the pandemic.