Medical treatment

"Randomized, controlled trials, the most stringent test of a medical treatment, aren’t easy to do for even straightforward interventions such as exercise or a daily pill."https://www.science.org/content/article/simple-house-may-help-prevent-multiple-fatal-diseases-african-children?utm_medium=email&utm_source=1440&utm_campaign=1440&user_id=66c4c92f5d78644b3ac5d5b4