Aérosols

Long-distance airborne dispersal of SARS-CoV-2 in COVID-19 wards | Scientific Reports

  Article Open Access Published: 11 November 2020 Long-distance airborne dispersal of SARS-CoV-2 in COVID-19 wards Scientific Reports volume 10, Article number: 19589 (2020) Cite this article 153 Altmetric Metrics details Abstract Evidence suggests that SARS-CoV-2, as well as other coronaviruses, can be dispersed and potentially transmitted by aerosols directly or via ventilation systems. We therefore investigated ventilation openings in one COVID-19 ward and central ducts that expel indoor air from three COVID-19 wards at Uppsala University Hospital, Sweden, during April and May 2020. Swab samples were taken from individual ceiling ventilation openings and surfaces in central ducts. Samples were subsequently subjected to… Lire la suite »Long-distance airborne dispersal of SARS-CoV-2 in COVID-19 wards | Scientific Reports

DLR – Institute for Software Technology – Aeromask – Aerosols and their interaction with face masks

Aeromask – Aerosols and their interaction with face masks The DLR Institute for Software Technology, the Institute of Aerospace Medicine and the Institute of Aerodynamics and Flow Technology are investigating the effectiveness of oronasal masks in the joint project « Aeromask ». The experiments make quantitative statements about the influence of face masks on the behavior of exhaled aerosols and particles. Project goal In contrast to earlier pandemics, molecular biological detection methods are now available to track the spread of a pandemic and its source, in this case the SARS-Cov-2 virus. It is still unknown, however, how exactly the viruses excreted by… Lire la suite »DLR – Institute for Software Technology – Aeromask – Aerosols and their interaction with face masks

Covid-19 : le « modèle emmental » montre aussi pourquoi la désinformation est si grave | Numerama

  Les gestes barrières forment un ensemble, comme le montre cette illustration basée sur le modèle de l’emmental. Les gestes barrières contre le coronavirus fonctionnent comme un ensemble. Seuls, ils ont peu d’utilité. Il serait absurde de porter un masque, mais de se tenir à 50 cm de quelqu’un quand c’est évitable ou de ne pas se laver les mains en rentrant. Tous ces gestes doivent être combinés, d’autant plus que certains servent à se protéger, d’autres à protéger les autres. Ils sont importants dans les deux sens, puisque combattre une crise sanitaire revient à allier l’individuel et le collectif.… Lire la suite »Covid-19 : le « modèle emmental » montre aussi pourquoi la désinformation est si grave | Numerama

Un salon, un bar et une classe: ainsi se transmet le coronavirus dans l’air | Ciencia | EL PAÍS

    Les intérieurs sont plus dangereux, mais les risques peuvent être réduits en mettant en place toutes les mesures disponibles pour lutter contre la contagion des aérosols. Voici les probabilités d’infection dans ces trois scénarios quotidiens en fonction de la ventilation, des masques et de la durée de la rencontre Six personnes, dont une est contaminée, se réunissent dans une maison. 31% des foyers connus en Espagne apparaissent dans ce genre de réunions sociales, notamment dans les rencontres avec des membres de la famille et des amis. Indépendamment de la distance, si les cinq autres personnes passaient quatre heures… Lire la suite »Un salon, un bar et une classe: ainsi se transmet le coronavirus dans l’air | Ciencia | EL PAÍS

Covid-19 : l’Allemagne investit massivement dans un plan de ventilation et la France serait bien inspirée de l’imiter | Atlantico.fr

Atlantico.fr : Le gouvernement allemand a investi 500 millions d’euros dans l’amélioration des systèmes de ventilation des bâtiments publics, afin d’aider à arrêter la propagation du coronavirus. Sont concernés pour le moment : les bureaux publics, les musées, les théâtres, les universités et les écoles. Les gouttelettes expirées par les personnes infectées resteraient au moins 8 minutes dans l’air d’une pièce. L’objectif est de moderniser les systèmes de climatisation existants. Pourquoi est-ce important de faire cela ? (…) Source: Covid-19 : l’Allemagne investit massivement dans un plan de ventilation et la France serait bien inspirée de l’imiter | Atlantico.fr

Aerosol transmission of Covid-19: A room, a bar and a classroom: how the coronavirus is spread through the air | Society | EL PAÍS in English

The risk of contagion is highest in indoor spaces but can be reduced by applying all available measures to combat infection via aerosols. Here is an overview of the likelihood of infection in three everyday scenarios, based on the safety measures used and the length of exposure Scrolling 1 Six people get together in a private home, one of whom is infected. Some 31% of coronavirus outbreaks recorded in Spain are caused by this kind of gathering, mainly between family and friends. Irrespective of whether safe distances are maintained, if the six people spend four hours together talking loudly, without… Lire la suite »Aerosol transmission of Covid-19: A room, a bar and a classroom: how the coronavirus is spread through the air | Society | EL PAÍS in English

It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19) | Clinical Infectious Diseases | Oxford Academic

We appeal to the medical community and to the relevant national and international bodies to recognize the potential for airborne spread of coronavirus disease 2019 (COVID-19). There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets (microdroplets) at short to medium distances (up to several meters, or room scale), and we are advocating for the use of preventive measures to mitigate this route of airborne transmission. Studies by the signatories and other scientists have demonstrated beyond any reasonable doubt that viruses are released during exhalation, talking, and coughing in microdroplets small enough to remain aloft in air… Lire la suite »It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19) | Clinical Infectious Diseases | Oxford Academic

Understanding ‘aerosol transmission’ could be key to controlling coronavirus | The Guardian

Imagine you think there are mice in your house. You can see the evidence – mouse droppings; gnawed or damaged skirting boards; holes left in food packaging. You call a local pest control team who confirm that you have mice and advise you on what is needed to remove them. Neither of you have actually had to see a mouse to reach this conclusion. The same kind of thinking can be applied to the transmission of coronavirus. We don’t need to see the virus to understand how it spreads. Recent studies from China show that patients infected with Covid-19 in… Lire la suite »Understanding ‘aerosol transmission’ could be key to controlling coronavirus | The Guardian

Covid-19’s wintry mix: Dry indoor air helps the virus spread – STAT

Covid-19’s wintry mix: As we move indoors, dry air will help the coronavirus spread It’s not just the cold, it’s the humidity. Winter in the northern United States will soon drive even the most diehard outdoor diners and backyard socializers indoors, bringing with them heightened risk for contracting and spreading Covid-19. The worry is not just that people might mingle more closely inside, but that the air they breathe will make the virus more dangerous.Cold, dry air facilitates the spread of the coronavirus, and the social distancing that helped outside won’t be as effective indoors, scientists said. “I do worry… Lire la suite »Covid-19’s wintry mix: Dry indoor air helps the virus spread – STAT