Both devices can help but won't provide 100% protection against the virus. The humidifier creates an optimal indoor climate in which viruses find it much harder to survive. Watch the video! Air purifiers can remove some viruses from the air using a HEPA or electrostatic filter. However a conventional domestic air purifier won’t be able to completely eliminate all viruses from a room. In addition, viruses can survive in a filter for a long period of time. That is why it is very important for filters to be replaced and cleaned regularly.