They are including the rates of infection from the time at which testing began. It makes no sense to include the rate from March at 0.4% because it's currently July and the rate is 35%. The risk of infection in March is irrelevant in July. It artificially lowers the current rate of infection and gives people a false sense of security!
They are including the rates of infection from the time at which testing began. It makes no sense to include the rate from March at 0.4% because it's currently July and the rate is 35%. The risk of infection in March is irrelevant in July. It artificially lowers the current rate of infection and gives people a false sense of security!