The IUF precautionary approach to the spread of COVID-19 has been validated by the emerging scientific consensus on the aerosol spread of the disease. The initial World Health Organization (WHO) assessment was that COVID-19 was primarily spread through 'droplets' from an infected person's coughs and sneezes and through contamination of hard surfaces. This was the basis for advising one meter physical distancing in the workplace.
The IUF advocated for 2 meter physical distancing as one of many precautions to be adopted because of the uncertainty over the possibility of transmission by smaller particles travelling further through the air.