Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Guangdong Provincial Center for Disease Control and Prevention, Guangdong province, China.
Int J Infect Dis. 2022 Sep;122:83-92. doi: 10.1016/j.ijid.2022.05.047. Epub 2022 May 29.
Infectious viruses (e.g., SARS-CoV-2, norovirus) can transmit through surfaces. Norovirus has infected millions of individuals annually. Interventions on norovirus transmission in high-risk indoor environment are important.
This study focused on a restaurant in Guangzhou, China. More than 41,000 touches by both diners and staff members were collected using video cameras. A surface transmission model was developed and combined with these real human touch behaviors to analyze the effectiveness of different norovirus prevention strategies.
When the virus carrier was a diner, the virus intake fraction of diners in the same table was the highest. Increasing the touch frequency on personal private surfaces would reduce the virus exposure. The virus intake fraction was reduced by 18.4% on average if public surfaces were not touched. Optimization on surface materials could reduce the virus intake fraction by 86.6%. Additionally, disinfecting tablecloths, clothes of diners, and chairs were the three most effective surface disinfection strategies.
Controlling human touch behavior (e.g., reducing the self-touches on mucous membranes) is more effective than surface disinfection in controlling norovirus transmission, but surface disinfection cannot be ignored because human behavior is difficult to be controlled.
传染性病毒（例如 SARS-CoV-2、诺如病毒）可通过表面传播。每年有数百万个人感染诺如病毒。因此，在高危室内环境中采取措施来控制诺如病毒的传播非常重要。
本研究聚焦于中国广州的一家餐厅。通过摄像机收集了超过 41000 名食客和员工的触摸数据。建立了一个表面传播模型，并结合这些真实的人类触摸行为，分析了不同的诺如病毒预防策略的效果。
当病毒携带者是食客时，同桌食客的病毒摄入分数最高。增加对个人私人表面的触摸频率会减少病毒暴露。如果不接触公共表面，病毒摄入分数平均降低 18.4%。优化表面材料可以将病毒摄入分数降低 86.6%。此外，对桌布、食客衣物和椅子进行消毒是三种最有效的表面消毒策略。
控制人类触摸行为（例如，减少对黏膜的自我触摸）比表面消毒更能有效控制诺如病毒的传播，但不能忽视表面消毒，因为人类行为很难控制。
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