Advantages: Efficiency, floral fragrance.
Disadvantages: Strong pressure, while spraying.
My son was sick up to 3 years: a respiratory catarrh, sore throat, runny nose, cough.
According to doctors' recommendations, we tried many means to enhance immunity. Most of them proved to be ineffective.
Respiratory Spray IRS-19 - many times helped us not get into kindergarten, if we had been ill recently, or if the group hurt a lot of kids. We also used it for healing stages.
I really liked it a pleasant aroma: it smells like lilacs. Son apparently also liked - did not resist when sprayed.
The only thing I did not like, it is a strong pressure means when spraying. The jet as "beats" in the nose that can even shed a tear.