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Airborne route and bad use of ventilation systems as non-negligible factors in SARS-CoV-2 transmission.
Med Hypotheses. 2020 Aug; 141:109781.MH

Abstract

The world is facing a pandemic of unseen proportions caused by a corona virus named SARS-CoV-2 with unprecedent worldwide measures being taken to tackle its contagion. Person-to-person transmission is accepted but WHO only considers aerosol transmission when procedures or support treatments that produce aerosol are performed. Transmission mechanisms are not fully understood and there is evidence for an airborne route to be considered, as the virus remains viable in aerosols for at least 3 h and that mask usage was the best intervention to prevent infection. Heating, Ventilation and Air Conditioning Systems (HVAC) are used as a primary infection disease control measure. However, if not correctly used, they may contribute to the transmission/spreading of airborne diseases as proposed in the past for SARS. The authors believe that airborne transmission is possible and that HVAC systems when not adequately used may contribute to the transmission of the virus, as suggested by descriptions from Japan, Germany, and the Diamond Princess Cruise Ship. Previous SARS outbreaks reported at Amoy Gardens, Emergency Rooms and Hotels, also suggested an airborne transmission. Further studies are warranted to confirm our hypotheses but the assumption of such way of transmission would cause a major shift in measures recommended to prevent infection such as the disseminated use of masks and structural changes to hospital and other facilities with HVAC systems.

Authors+Show Affiliations

CNC - Center for Neurosciences and Cell Biology, University of Coimbra, Portugal; FMUC - Faculty of Medicine, University of Coimbra, Coimbra, Portugal.FMUC - Faculty of Medicine, University of Coimbra, Coimbra, Portugal.ADAI, LAETA Department of Mechanical Engineering, University of Coimbra, Portugal.CNC - Center for Neurosciences and Cell Biology, University of Coimbra, Portugal; FMUC - Faculty of Medicine, University of Coimbra, Coimbra, Portugal.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32361528

Citation

Correia, G, et al. "Airborne Route and Bad Use of Ventilation Systems as Non-negligible Factors in SARS-CoV-2 Transmission." Medical Hypotheses, vol. 141, 2020, p. 109781.
Correia G, Rodrigues L, Gameiro da Silva M, et al. Airborne route and bad use of ventilation systems as non-negligible factors in SARS-CoV-2 transmission. Med Hypotheses. 2020;141:109781.
Correia, G., Rodrigues, L., Gameiro da Silva, M., & Gonçalves, T. (2020). Airborne route and bad use of ventilation systems as non-negligible factors in SARS-CoV-2 transmission. Medical Hypotheses, 141, 109781. https://doi.org/10.1016/j.mehy.2020.109781
Correia G, et al. Airborne Route and Bad Use of Ventilation Systems as Non-negligible Factors in SARS-CoV-2 Transmission. Med Hypotheses. 2020;141:109781. PubMed PMID: 32361528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Airborne route and bad use of ventilation systems as non-negligible factors in SARS-CoV-2 transmission. AU - Correia,G, AU - Rodrigues,L, AU - Gameiro da Silva,M, AU - Gonçalves,T, Y1 - 2020/04/25/ PY - 2020/04/14/received PY - 2020/04/21/accepted PY - 2020/5/4/pubmed PY - 2020/7/4/medline PY - 2020/5/4/entrez KW - Aerosol KW - COVID-19 KW - HVAC KW - SARS-Cov-2 KW - Ventilation SP - 109781 EP - 109781 JF - Medical hypotheses JO - Med Hypotheses VL - 141 N2 - The world is facing a pandemic of unseen proportions caused by a corona virus named SARS-CoV-2 with unprecedent worldwide measures being taken to tackle its contagion. Person-to-person transmission is accepted but WHO only considers aerosol transmission when procedures or support treatments that produce aerosol are performed. Transmission mechanisms are not fully understood and there is evidence for an airborne route to be considered, as the virus remains viable in aerosols for at least 3 h and that mask usage was the best intervention to prevent infection. Heating, Ventilation and Air Conditioning Systems (HVAC) are used as a primary infection disease control measure. However, if not correctly used, they may contribute to the transmission/spreading of airborne diseases as proposed in the past for SARS. The authors believe that airborne transmission is possible and that HVAC systems when not adequately used may contribute to the transmission of the virus, as suggested by descriptions from Japan, Germany, and the Diamond Princess Cruise Ship. Previous SARS outbreaks reported at Amoy Gardens, Emergency Rooms and Hotels, also suggested an airborne transmission. Further studies are warranted to confirm our hypotheses but the assumption of such way of transmission would cause a major shift in measures recommended to prevent infection such as the disseminated use of masks and structural changes to hospital and other facilities with HVAC systems. SN - 1532-2777 UR - https://www.unboundmedicine.com/medline/citation/32361528/Airborne_route_and_bad_use_of_ventilation_systems_as_non_negligible_factors_in_SARS_CoV_2_transmission_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0306-9877(20)30801-X DB - PRIME DP - Unbound Medicine ER -