Another question most of these studies fail to ask is what is the effectiveness of each type of mask? An N95 mask is going to have a big difference in efficacy

Another question most of these studies fail to ask is what is the effectiveness of each type of mask? An N95 mask is going to have a big difference in efficacy vs a surgical mask without a seal. Another issue is that most of these studies are just surveys. Did participants actually use their masks for x hours? Did they use their masks correctly?