Uh, there's no requirement to use placebos or a control group. For example, covid just uses a treatment group and considers the rest of the world as control.

Uh, there's no requirement to use placebos or a control group. For example, covid just uses a treatment group and considers the rest of the world as control. https://pmc.ncbi.nlm.nih.gov/articles/PMC9124157/ https://pmc.ncbi.nlm.nih.gov/articles/PMC9124157/