Comment by jjk166

And this effect produces an increase in rates. Let's say that an entire population gets two dice. They roll the first one, if it's even they're out, otherwise they roll the next one. About 1 in 12 people are going to roll a 6 on that second dice. Now let's say for that first dice, you're only out if you get a 6. Now the odds of getting a 6 on the second dice is about 1 in 7, not because the second dice is any more likely to get a 6 but because a greater percentage of people who would roll 6's are rolling that second dice. The first dice in this analogy are diseases that we can now deal with, the second dice are the more intractable diseases.