question: The sudden outbreak and global spread of COVID-19 demanded a tremendous amount of attention for viral respiratory infections (VRIs) in modern times. Evidence accumulated over the past few decades increasingly suggests the importance of recognizing the background and context of lifestyle factors in the prevention of VRIs recurrence. The focus of attention has specifically been on how to optimize respiratory barrier function and immune function during the period of the pandemic outbreak. This viewpoint discusses the impact of a healthy lifestyle on VRIs and demonstrates a practical approach to preventing the occurrence of VRIs based on contemporary evidence.