Exactly. If you have a 100% effective treatment for a disease, but only 10% are able to maintain the regimen, you have a 10% effective treatment. The distinctio

Exactly. If you have a 100% effective treatment for a disease, but only 10% are able to maintain the regimen, you have a 10% effective treatment. The distinction is obviously critical at the individual level, but at the policy level you need to know what the actual result of a recommended treatment will be. It’s like how condoms are 87% effective because the rate includes people who don’t use them consistently. Knowing that they’re 98% effective when used properly is important knowledge to the individual, but the effective rate is more important to anyone advising policy of what advice to give.