Well, the test ideally would give a positive result. It would say positive for all of them, but we know that it's not a perfect test. It's going to give negative for some of them. It will falsely give a negative result for some of them. And we know that because it has a false negative rate of 1%. And so of these 500, 99% is going to get the correct result in that they're going to test positive. So what is 99% of 500?