indiaUpdated: Sep 15, 2020 15:52 ISTAn experiment conducted by researchers from Duke University has found well-fitted valve-less N95 masks, triple-layer surgical masks and double-layer pleated cotton masks (that can be tied tightly) are the most effective in stopping the spread of the coronavirus (Covid-19). The researchers analysed 13 kinds of popularly used face masks to determine the best to stop the spread of the virus. Also read: Battle against Covid-19 far from over, says Harsh Vardhan in ParliamentThe experiment showed well-fitted valve-less N95 masks, triple-layer surgical masks and double-layer pleated cotton masks let less than 15% of the droplets escape, when compared to the number of droplets generated when someone spoke without a face cover. Double-layer cotton masks were among masks that were a little less effective – though, at 20% transmission, they were still fairly effective. The experiment also confirmed the suspicion that N95 masks with exhalation valve transmitted more droplets since they are meant to allow outwards airflow.

Source: Hindustan Times September 15, 2020 08:19 UTC