Most major global economies were hard-hit during the COVID-19 pandemic, shining a light on the health of our indoor air, particularly in public spaces. For many nations, re-opening brick-and-mortar retail stores safely and efficiently has been a priority, and while basic safety measures have been put in place, providing clean air to customers and shop assistants requires more than simple air purification — it needs to be prioritized to protect the health of communities and the local economy.