My 3 year old had a very bad cough, chest congestion and fatigue for 2 days...i gave him lemon juice and acv baking soda. No much effect on cough and it was getting worse. Finally mixed 1/2 teaspoon of cayenne in 2 teaspoon of ACV baking soda with 1 teaspoon water. Cough stopped instantly and in 10 mins he was playing. chest congestion cleared 80%. Thank you earthclinic. i visit this website regularly.