The children have been sick at home since September 19th. The grandson is…

The children have been sick at home since September 19th. The grandson is 2.3 years old and has vomiting, diarrhea, yellow tinge with water consistency. He complains of abdominal pain constantly. We went to a private clinic. Our pediatrician prescribed injections cycloferon, Linctus, Polisorb - enterosorbent, Creon. Yesterday after two IV drips, he became better. He played a little bit, ate a little, smiled. In the morning again, his stomach started going to the toilet with green tinge. Now it's mushy, he cries constantly. She is already helpless and the baby is suffering! This is the first time we have had such an illness. How long does intestinal infection last?