In the absence of good data, the fallback is a position of ignorance -- not acceptance of bad data. The prior studies were neither well-done nor directly relev

In the absence of good data, the fallback is a position of ignorance -- not acceptance of bad data. The prior studies were neither well-done nor directly relevant. As such, they didn't constitute good evidence on the topic of mask-wearing for the recent pandemic. The proper understanding would then be that the effectiveness of masks was little informed by such studies.