BBCNEWS Outside Source September 2, 2021 18:50:00
Study and bangladesh that a? - each stage. are you carrying on the study and bangladesh that a? no, | each stage. are you carrying on the i study and bangladesh that a? no, we are now adding _ study and bangladesh that a? no, we are now adding some _ are now adding some second—generation questions. we are interested to look at mask that might have even higher filtration inefficiencies like the bm 95, for example. were also interested in specific assessed and spiked begets the delta variance. because this study was done before the delta variant was widespread.- study was done before the delta...
Source: archive.org