We have given one [Infratonic 9] to our friends who have a son with Downs Syndrome. He suffers from a very bad cough and has been diagnosed with RSV in the past. His parents use the unit on his chest and back and then place it on the floor or between the mattress and box in his bed and aim it up at him. Within 24-36 hours he has made a complete turn around! They have used it for this the last two winters with great success!