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Volume 26, Number 7—July 2020

Aerosol and Surface Distribution of Severe Acute Respiratory Syndrome Coronavirus 2 in Hospital Wards, Wuhan, China, 2020

Zhen-Dong Guo1, Zhong-Yi Wang1, Shou-Feng Zhang1, Xiao Li, Lin Li, Chao Li, Yan Cui, Rui-Bin Fu, Yun-Zhu Dong, Xiang-Yang Chi, Meng-Yao Zhang, Kun Liu, Cheng Cao, Bin Liu, Ke Zhang, Yu-Wei GaoComments to Author , Bing LuComments to Author , and Wei ChenComments to Author 
Author affiliations: Academy of Military Medical Sciences, Beijing, China (Z.-D. Guo, Z.-Y. Wang, S.-F. Zhang, X. Li, L. Li, Y.-Z. Dong, X.-Y. Chi, M.-Y. Zhang, C. Cao, K. Zhang, Y.-W. Gao, B. Lu, W. Chen); Institute of Medical Support Technology, Institute of Systems Engineering, Academy of Military Sciences, Tianjin, China (C. Li); Wuhan Huoshenshan Hospital, Wuhan, China (Y. Cui, R.-B. Fu, B. Liu); Central Theater General Hospital, Wuhan (K. Liu)

Main Article

Table 2

Results of testing for SARS-CoV-2 in general ward, Huoshenshan Hospital, Wuhan, China, 2020*

Area, sample
Intense positive/weak positive/negative†
Rate of positivity, %
Average virus concentration‡
Contaminated area
Isolation ward
Floor 1/1/11 15.4 1.6 × 104
Doorknob 0/1/11 8.3 6.5 × 102
Air outlet 0/1/11 8.3 3.4 × 103
Sickbed handrail 0/0/12 0 ND
Patient mask 1/1/8 20 9.2 × 103
Indoor air (sampling site 1 in Figure 2, panel C) 0/2/9 18.2 0.68
Indoor air (sampling site 2 in Figure 2, panel C) 0/0/5 0 ND
Patient corridor
Floor 0/0/10 0 ND
Computer mouse or keyboard 0/1/4 20 3.9 × 103
Trash can 0/0/8 0 ND
Indoor air 0/0/4 0 ND
Face shield of medical staff 0/0/3 0 ND
Sleeve cuff of medical staff 0/0/3 0 ND
Glove of medical staff 0/0/3 0 ND
Shoe sole of medical staff 0/0/3 0 ND
Semicontaminated area
Dressing Room 4
Floor 0/0/5 0 ND
Indoor air 0/0/5 0 ND
Doorknob 0/0/3 0 ND
Buffer Room 3
Floor 0/0/5 0 ND
Indoor air 0/0/3 0 ND
Doorknob 0/0/3 0 ND
Clean area
Dressing Rooms 1, 2, 3, and 5
Doorknob 0/0/12 0 ND
Floor 0/0/12 0 ND
Indoor air 0/0/6 0 ND
Buffer rooms 1 and 2
Doorknob 0/0/6 0 ND
Floor 0/0/6 0 ND
Indoor air 0/0/4 0 ND
Total 2/7/175 4.9 NA

*NA, not applicable; ND, not determined; PPE, personal protective equipment; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
†Intense positive indicates a positive result for both open reading frame 1ab gene and nucleoprotein gene of SARS-CoV-2; weak positive indicates a positive result for only 1 of the genes.
‡The average virus concentration of indoor air expressed as copies/L and of swab samples, as copies/sample.

Main Article

1These authors contributed equally to this article.

Page created: April 10, 2020
Page updated: June 18, 2020
Page reviewed: June 18, 2020
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