I don't want to confuse you. I was using the population in more of the conversational sense than the statistical sense. But anyway, of our sample, and we're using all of the data, because we're assuming there's no difference. We might as well just use the total data to figure out the expected frequency of getting sick and not getting sick. So 80 divided by 380 did not get sick, and that's 21%. So let me write that over here. So that's 21% of the total.