期刊
CURRENT OPINION IN INFECTIOUS DISEASES
卷 32, 期 4, 页码 372-379出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/QCO.0000000000000563
关键词
aerosol; droplet; healthcare settings; infection control; respiratory viruses
资金
- Collaborative Research Fund from the University Grants Committee of Hong Kong
Purpose of review Health agencies recommend transmission-based precautions, including contact, droplet and airborne precautions, to mitigate transmission of respiratory viruses in healthcare settings. There is particular controversy over the importance of aerosol transmission and whether airborne precautions should be recommended for some respiratory viruses. Here, we review the current recommendations of transmission-based precautions and the latest evidence on the aerosol transmission of respiratory viruses. Recent findings Viral nucleic acids, and in some instances viable viruses, have been detected in aerosols in the air in healthcare settings for some respiratory viruses such as seasonal and avian influenza viruses, Middle East respiratory syndrome-coronavirus and respiratory syncytial virus. However, current evidences are yet to demonstrate that these viruses can effectively spread via airborne route between individuals, or whether preventive measures in airborne precautions would be effective. Summary Studies that use transmission events as outcome to demonstrate human-to-human transmission over the aerosol route or quantitative measurement of infectious respiratory viruses in the air are needed to evaluate the infectiousness of respiratory viruses over the aerosol route. When a respiratory virus in concern only leads to disease with low severity,airborne precautions are not likely to be justified.
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