Every mask, every pill and every jab or other item being distributed as fighting or preventing C19 should be required to assert a guarantee of efficacy. If they can’t provide one (they can’t) then they must state so plainly on every unit. As in, yes, a tag on each individual mask asserting they cannot stop the spread of the disease. Every jab requiring that the recipient be informed that the value of the shot is virtually nonexistent. Let’s see how well it goes then.