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Volume 26, Number 7—July 2020
Dispatch

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 1

Results of testing for SARS-CoV-2 in intensive care unit, Huoshenshan Hospital, Wuhan, China, 2020*

Area, sample
 Intense positive/weak positive/negative†
 Rate of positivity, %
 Average virus concentration‡
Contaminated area
Isolation wards
Floor 6/1/3 70 6.6 × 104
Computer mouse 4/2/2 75 2.8 × 104
Trash can 0/3/2 60 3.4 × 104
Sickbed handrail 2/4/8 42.9 4.3 × 104
Patient mask 1/1/3 40 3.3 × 103
Air outlet filter 4/4/4 66.7 1.5 × 105
Indoor air near the air outlet (sampling site 1 in Figure 2, panel A) 2/3/9 35.7 3.8
Indoor air near the patients (sampling site 2 in Figure 2, panel A) 2/6/10 44.4 1.4
Indoor air near the doctors’ office area (sampling site 3 in Figure 2, panel A) 0/1/7 12.5 0.52
Pharmacy
Floor 3/0/0 100 7.45 × 104
Indoor air 0/0/5 0 ND
  PPE
Face shield of medical staff 0/0/6 0 ND
Sleeve cuff of medical staff 0/1/5 16.7 7.1 × 103
Glove of medical staff 0/1/3 25 2.9 × 103
Shoe sole of medical staff 3/0/3 50 3.2 × 104
Subtotal
 27/27/70
 43.5
 NA
Semicontaminated area
Buffer room 1
Floor 0/0/5 0 ND
Air outlet filter 0/0/3 0 ND
Indoor air 0/0/5 0 ND
Doorknob 0/0/3 0 ND
Dressing room 4
Floor 0/3/5 37.5 3.8 × 103
Air outlet filter 0/0/3 0 ND
Indoor air 0/0/5 0 ND
Doorknob 0/0/4 0 ND
Subtotal
 0/3/33
 8.3
 NA
Clean area
Dressing rooms 1, 2, and 3
Doorknob 0/0/10 0 ND
Floor 0/0/12 0 ND
Indoor air 0/0/8 0 ND
Nurse station
Doorknob 0/0/5 0 ND
Floor 0/0/5 0 ND
Indoor air 0/0/5 0 ND
Dressing rooms 5 and 6, buffer rooms 2 and 3
Doorknob 0/0/12 0 ND
Floor 0/0/12 0 ND
Indoor air 0/0/12 0 ND
Subtotal
Total 27/30/184 23.7 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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