When RSV-infected children are admitted to the hospital, their viral load is most likely too high in order for GS-5806 to be effective. Next to that, the body's defense mechanism’s response to the virus can also harm the lungs of the patient, next to the harmful effects of the virus itself. This mechanism has not been addressed in this study, therefore practical application of the compound is questionable.
It is, however, a step in the direction of a cure. The Dutch article can be read here.