https://www.condairgroup.com/humidity-health-wellbeing/scientific-studies/criteria-for-human-exposure-to-humidity-in-occupied-buildings shows how the effect on humidity on various risk factors and based on it I would suggest 50-60% is ideal for fighting viruses.
https://www.condairgroup.com/humidity-health-wellbeing/scientific-studies/criteria-for-human-exposure-to-humidity-in-occupied-buildings shows how the effect on humidity on various risk factors and based on it I would suggest 50-60% is ideal for fighting viruses.