Hacker News new | ask | show | jobs
by rfatnabayeff 4418 days ago
It's not about rarity of the disease. The problem with those percentages is that they're commercial bragging. The 99.9% accuracy is indeed very poor accuracy in case where there is 99.999% chance that one doesn't have a disease at all. It's just measuring the length of a bacteria with carpenter's tape ruler - the tool is too poor.