Well, that would be a valid thing to note as false. Perhaps you meant "in this particular study, there is no evidence that mask use helped reduce the spread of

Well, that would be a valid thing to note as false. Perhaps you meant "in this particular study, there is no evidence that mask use helped reduce the spread of COVID", in which case, yes; people will understand it as "this study showed that masks don't work" rather than "this was a poorly conducted study"