Individuals wore the air quality backpack during their sanctioned essential journeys during the lockdown period between April and June, whether that be visiting the grocery store, an essential commute to work or daily exercise routes. These journeys were then revisited by participants once the cities reopened, allowing for the comparison of pollution exposure levels between the lockdown and post-lockdown period.
This outdoor data was analyzed alongside outdoor air quality sensor networks, and Dyson’s vast database of indoor purifier data. Dyson engineers examined data from over 38,000 Dyson purifiers from around the world, helping to build a picture of the overall impact of lockdown on air quality both indoors and outdoors.