The CDC recommends using MERV-13 air filters in HVAC systems and suggest at least five air changes per hour to reduce germs.
https://www.cnn.com/2023/05/12/health/cdc-new-ventilation-target/index.html
Consider purchasing the innovative KorganoTech drop-in pathogen filters, which not only efficiently capture viruses and bacteria but also prevent them from growing and reproducing to provide an extra layer of safety and protection.