@redbaybound @jolly1766 @jimhubbell6177 @RadioFreeTom Fine. Where is the study that population-wide use of N95s reduces the contact rate by 83%?
@jolly1766@jimhubbell6177@RadioFreeTom Fine的红色海湾。哪里有研究表明，在人群中广泛使用N95可将接触率降低83%？
@redbaybound @jolly1766 @jimhubbell6177 @RadioFreeTom Fine. Where is the study that population-wide use of N95s reduces the contact rate by 83%?
@jolly1766@jimhubbell6177@RadioFreeTom Fine的红色海湾。哪里有研究表明，在人群中广泛使用N95可将接触率降低83%？