Medical experiments

Have you heard about medical experiments being conducted on people without their knowledge?  In the past this used to be common practice.  

Here are two examples of this:

https://www.history.com/news/the-infamous-40-year-tuskegee-study 

 https://edition.cnn.com/2019/10/30/health/swedish-cavity-experiment-wellness/index.html

Have you heard of any others?  Are these types of non-consensual experiments necessary or ethical? I'd like to hear your thoughts on the matter on Tuesday.

See you then!