Average humidity levels of less than 38% increase risk of upper respiratory symptoms

A recently released study published in Indoor Air Journal from Japan, has found significant evidence that average humidity levels of less than 38% showed an increased risk of upper respiratory symptoms.

The study entitled ‘A longitudinal study on the effects of hygro‐thermal conditions and indoor air pollutants on building‐related symptoms in office buildings’ can be viewed in full here: Indoor Air - Volume 32, Issue 11.