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Coronavirus: Can It Spread Through Air?
Boldsky | 24th Mar, 2020 04:05 PM
  • What Are Aerosol-generating Procedures (AGPs)?

    Certain medical procedures produce aerosols that stay in the atmosphere for a longer period of time. Some of the AGPs are as follows [1]:

    • Tracheotomy/tracheostomy procedures,
    • Intubation, extubation and related procedures,
    • Bronchoscopy,
    • Non-invasive ventilation (NIV) e.g. Bi-level Positive Airway Pressure (BiPAP) and
    • Continuous Positive Airway Pressure Ventilation (CPAP),
    • Surgery and post-mortem procedures in which high-speed devices are used,
    • High-frequency oscillating ventilation (HFOV),
    • High-flow Nasal Oxygen (HFNO),
    • Induction of sputum (see glossary) and
    • Some dental procedures (e.g. high-speed drilling).

    So, when these are done in a medical care facility, there is a possibility that these particles become aerosolized, which means they can stay in the air a little bit longer.

  • Healthcare Workers Should Take Extra Precautions - WHO

    The coronavirus spreads through person-to-person, that is between people who are in close contact with one another (within about 6 feet) and through respiratory droplets produced when an infected person coughs or sneezes [2].

    It can also spread from contact with contaminated surfaces or objects when a person touches a surface or object that has the virus on it and then touching their own mouth, nose, or possibly their eyes. However, this is not thought to be the primary way the virus spreads [3].

    As the virus is transmitted through droplets, or little bits of liquid, mostly through sneezing or coughing, this increases the risk for healthcare workers. That is when doing an aerosol-generating procedure like in medical care facilities, the risk of covid-19 transmission is high [4].

    Due to the AGPs, the particles can stay in the air a little bit longer, raising the need that health-care workers should take additional precautions when they are working on patients and doing those procedures.

    The officials also added that "Infections contracted from surfaces rather than through the air could have contributed to the outbreak on the Diamond Princess cruise ship" [5].

  • Factors Such As Heat And Humidity Matters

    According to WHO officials, the coronavirus can go airborne, staying suspended in the air depending on factors such as heat and humidity [6]. Health experts and researchers are looking at the different environmental conditions that COVID-19 can persist.

    The studies are specifically examining how humidity, temperature and ultraviolet lighting affects the disease as well as how long it lives on different surfaces, including steel. The officials added, "In health-care facilities, we make sure health-care workers use standard droplet precautions with the exception ... that they're doing an aerosol-generating procedure" [7].

    On copper and steel, the virus can survive for about two hours, and on other surfaces like cardboard or plastic, the virus can survive for a longer period.

    Some studies have indicated that humidity can have a greater impact on our vulnerability to the disease. That is, when the air is drier than usual, it can reduce the amount of mucus coating our lungs and airways - which forms a natural defence against infections - and without it, we are prone to contracting infections [8].

  • On A Final Note…

    As of now, WHO is studying the emerging data on coronavirus aerosols to see if the current recommendations need to be changed, including that healthy people do not need face masks. Health officials have added that healthcare workers should take extra precautions during procedures that can generate aerosols.

    More studies are being carried out.

    Stay home. Stay safe.

According to a recent report by the World Health Organisation, coronavirus can survive in the air due to aerosol-generating practices. This has led the WHO to consider airborne precautions for the medical staff. As of today, there are 382,750 coronavirus cases with 16,578 deaths. On a hopeful note, 102,522 have recovered.

The global shortage of protective gear for health workers and diagnostic tests will be met by Chinese producers who have agreed to supply the WHO. Air bridges will be used to supply the gears to avoid contact and any possible spread of infection.

However, the new finding that coronavirus can remain airborne is not a cause for fear, added WHO officials.

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