>Who’s to say that more issues won’t come up as time goes on? I don't think I was saying that they wouldn't. My estimate was based on pessimistically assuming

>Who’s to say that more issues won’t come up as time goes on? I don't think I was saying that they wouldn't. My estimate was based on pessimistically assuming there is a new issue every year. That could be because of a new vaccine or because of delayed issues uncovered with the existing ones.