▎ 摘　　要

NOVELTY - Filter comprises at least one polyurethane-based polymer foam, where the polyurethane-based polymer foam(s) comprises at least one virucidal/bactericidal agent comprising cetylpyridinium chloride and/or dimethyloctadecyl(3-(trimethyloxysilyl)propyl)ammonium chloride, where a portion of or all of a surface of the polyurethane-based polymer foam(s) have at least one virucidal/bactericidal agent(s) conjugated to it, and/or the polyurethane-based polymer foam(s) encapsulate(s) the virucidal/bactericidal agent(s). USE - The filter is useful in device including mask, breathing apparatus, face covering, vent cover, heating, ventilation, and air conditioning system, air handling system, air purifier or air conditioner (all claimed). ADVANTAGE - The filter provides the device that captures and/or inactivates various viruses and bacteria e.g. coronavirus disease (COVID-19) viral particles. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a device comprising the filter and, optionally, a high-efficiency particulate air (HEPA) filter.