The Defence Science and Technology Laboratory (Dstl) has published a

research paper on the stability of the COVID-19 virus in the air through

the Emerging Microbes and Infections journal.

The paper “Experimental aerosol survival of SARS-CoV-2 in artificial

saliva and tissue culture media at medium and high humidity”, written by

a team of Dstl scientists, outlines the research completed on the

stability of the COVID-19 virus in the air. It also supports the

scientific advice provided to the Government on COVID-19 control

measures.

The findings indicate that the COVID-19 virus may remain viable in

the dark for at least 90 minutes under certain conditions, if produced

within small-particle aerosols. These findings provide direct,

corroborating evidence that will help inform how the virus behaves

within healthcare environments.

Coughing and sneezing generally produce large particles of saliva,

but smaller particles will also be produced. Small particles are also

produced during routine activities such as talking and breathing.

Smaller aerosol particles may be of concern because they may stay

buoyant in the air for longer, travel further and be able to penetrate

further into the respiratory tract when inhaled.

Dstl, the science inside UK national security, has used its capability to investigate the generation of virus-containing particles to study the survival of the virus under different conditions. The research paper has also been shared with the Science Advisory Group for Emergencies (SAGE) and can be viewed here.

https://www.tandfonline.com/doi/full/10.1080/22221751.2020.1777906