Generally speaking, air purifiers do not disinfect or kill bacteria, but some air purifiers are equipped with ultraviolet lamps or other disinfection techniques to help purify bacteria and viruses in the air.

UV lamps are a common disinfection technique that can kill bacteria and viruses in the air. However, the effectiveness of this method is limited as it can only kill bacteria and viruses exposed to ultraviolet light. If the air purifier is equipped with a UV lamp, it is recommended to use it in conjunction with other filtering technologies to achieve the best results.