Usually remembers to get the pointy end up
- Apr 26, 2010
- Reaction score
Furthermore, you usually want this to be 'double-blind', meaning neither the subjects nor the researchers (initially) know whether you're in the control group or not. Obviously this is nearly impossible with masks.The key item here is "randomized control trials". To have a randomized control trial, you would need to get a raft of volunteers, randomly distribute them into mask and no-mask groups, and then see how many from each group get sick.
So, it reiterate the important part: Just because CDC says it is not aware of any "randomized control trials" does not mean there is no evidence, and it does not mean there is no science, supporting masks. There is plenty.