Table 1 Positive rate of air samples from different departments in medical areas Areas NO.of tests NO.of Positive Positive rate (%) General isolation wards 13 0 0.00 Ward 1 3 0 0.00 Ward 2 3 0 0.00 Ward 3 1 0 0.00 Ward 4 2 0 0.00 Ward 5 3 0 0.00 Ward 6 1 0 0.00 Intensive care units 13 0 0.00 Fever clinic 18 0 0.00 Emergency room 3 0 0.00 Observation room 1 0 0.00 Treatment room 1 0 0.00 Infusion room 1 0 0.00 Diagnosis room 1 2 0 0.00 Diagnosis room 2 2 0 0.00 Throat swab sampling room 2 0 0.00 Public area 6 0 0.00 Total 44 0 0.00