Deception in scientific studies is controversial but not universally forbidden. Here's a link diving into the issue for psychological/social science studies.

Deception in scientific studies is controversial but not universally forbidden. Here's a link diving into the issue for psychological/social science studies. I'm unsure how it impacts medicine research, but I imagine it's a similar attitude. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4502434/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4502434/