Table 2.

Viability percentage of PBMCs exposed to the PM₁₀ of dust storm and inversion (50–700 μg/ml) in MTT assay

PM concentration (μg/ml)	Percent of Cell viability
	Dust storm PM10		Inversion PM10
	Mean	SD	Mean	SD
Untreated cells	98.00	2.78	98.00	2.78
50	96.65	3.36	93.06	3.48
100	94.12	4.49	91.03	4.21
150	92.56	3.38	90.14	3.89
200	90.85	4.65	88.09	5.55
250	86.77	4.41	82.33	4.49
300	84.00	5.43	80.11	5.08
400	63.58	4.89	57.61	3.84
500	23.51	3.87	20.01	2.86
700	7.00	1.43	4.74	1.17