The Nanotechnology Industries Association (NIA) has posted a recording of its March 6, 2023, webinar on “Nano in Action: Antimicrobial Treatment.” The webinar explored a topic where relevance has been amplified by the COVID-19 pandemic, but that has long been on the to do list of the public building and transport sectors. Subjects covered included the current cleaning and sanitation protocols of public spaces; the kind of nano-based solutions available to meet this need; and how to measure the efficacy of an antimicrobial treatment.