Covid risk

There is consistent, strong evidence that SARS-CoV-2 spreads by airborne transmission.

An article recently published in The Lancet concluded that "we propose that it is a scientific error to use lack of direct evidence of SARS-CoV-2 in some air samples to cast doubt on airborne transmission while overlooking the quality and strength of the overall evidence base. There is consistent, strong evidence that SARS-CoV-2 spreads by airborne transmission. Although other routes can contribute, we believe that the airborne route is likely to be dominant. The public health community should act accordingly and without further delay."


Vaccinations reduce the risk of serious illness but do not prevent transmission’

"Society will have to learn to live with Covid in similar way to flu."

This statement was made by England's chief medical adviser Chis Whitty during a Royal Society of Medicine webinar.

Respiratory diseases such as Covid can be transmitted through small moisture droplets carrying the virus which are generated by people coughing, sneezing, shouting, singing or even breathing. They can travel for long distances and remain in the air for a long time.

Control measures including lockdowns and vaccination programmes have enabled us to start to get our lives back on track, but in situations where close contact is required we need solutions that minimise risk that are more effective and practical than masks or visors.


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Time and distance of close proximity increases the risk

World Health Organisation (WHO) advises that any situation in which people are in close proximity to one another for long periods of time increases the risk of transmission. Indoor locations, especially settings where there is poor ventilation, are riskier than outdoor locations. Activities where more particles are expelled from the mouth, such as singing or breathing heavily during exercise, also increase the risk of transmission.

Further it outlines settings that can exacerbate transmission of the Covid virus.

The "Three C's" are a useful way to think about this. They describe settings where transmission of the COVID-19 virus spreads more easily:

  • Crowded places;
  • Close-contact settings, especially where people have conversations very near each other;
  • Confined and enclosed spaces with poor ventilation.

The risk of COVID-19 spreading is especially high in places where these "3Cs" overlap.


Airshield® provides an effective solution to faciitate face-to-face consultations and meetings where ventilation systems are impractical or too expensive .

Find out more about Airshield