The reduction in infection rates wasn't large enough to qualify as statistically significant. That just means that the reduction that they saw from cloth masks could have been due to chance.
Edit: Since the size of the cloth mask group is half the size of the surgical masl group, the effect in the cloth mask group would have to be comperatively larger than the effect on the surgical masl group to qualify as significant.
Somewhow you take that as evidence cloth masks don't work?
The reduction in infection rates wasn't large enough to qualify as statistically significant. That just means that the reduction that they saw from cloth masks could have been due to chance.
Edit: Since the size of the cloth mask group is half the size of the surgical masl group, the effect in the cloth mask group would have to be comperatively larger than the effect on the surgical masl group to qualify as significant.
Somewhow you take that as evidence cloth masks don't work?