According to a leading epidemiologist, New Zealand should be aiming to vaccinate 90 percent of the eligible population if society is to cope with the Delta variant, RNZ reports. Rod Jackson, a professor of epidemiology at the University of Auckland, says coping with a quickly-spreading Delta variant required a maximum possible level of vaccination. “The only thing certain in this whole pandemic is that if you keep infected people away from uninfected people, we’ll knock this on the head.” Jackson said working out best practice with Delta is new territory for the world, and everyone was behind the game.