Table 2.

Filtering efficiency of SMs against PM₁₀.

S. N.	Surgical masks (SMs)	Without filtration (μg/m3) mean ± S.D	With filtration (μg/m3) mean ± S.D	TIL (%)	Efficiency (%)
1	SM 1	30 ± 14.59	17.5 ± 10.5	58	42
2	SM 2	32 ± 10.4	17.5 ± 4.67	55	45
3	SM 3	34.3 ± 2.44	20.1 ± 2.67	59	41
4	SM 4	36 ± 4.75	22.7 ± 6.22	63	37
5	SM 5	32.9 ± 2.02	18.5 ± 3.04	56	44
6	SM 6	34.7 ± 2.37	18.9 ± 4.32	54	46
7	SM 7	33.9 ± 14.41	21.1 ± 14.3	62	38