Results showed that 63.7% of workers complained of nasal congestion, 57.2% had itchy nose, 46.7% had rhinorrhea, and 66.1% had sneezing.
Kết quả cho thấy: 63,7% công nhân phàn nàn về nghẹt mũi, 57,2% có ngứa mũi, 46,7% chảy mũi, và 66,1% hắt hơi.