Doctor Nguyen Ton Kinh Thi, director of Thap Cham Hospital of Transport said the hospital mobilised its staff to treat the patients effectively. At present, some 13 workers are still in serious condition.
Workers were reported to have eaten breakfast at their workplace as their company had purchased 150 meals and several tins of bottled water for their workers from Hien business nearby.
The cause of the food poisoning incident is under investigation.