With many countries, such as England and Germany, choosing to re-impose stringent lockdowns amidst a third wave of coronavirus infections, the incentive for businesses to find alternative ways to continue operating is higher than ever. Given that mask-wearing and social distancing are less viable in winter temperatures, the question of indoor air purification presents itself as an enticing offer for businesses that typically rely on crowded indoor spaces, which carry a high risk for the spread of COVID-19 through aerosolization and direct contact.  Many big manufacturers of air purifiers, such as Philips, Molekule and Dyson, have been capitalizing on this trend and marketing their…