Day to day illnesses in children are mostly viral. Viral infections were always there, even when parents or grand parents were children. Nothing much has changed, parents do not remember their time of illness and get surprised each time when child gets sick. Why so much worry for cough, loose motions or fever? Check up with his Doctor is reassuring. These illnesses usually last for 6 to 7 days. Just keep your child well-hydrated and keep his fever down with medicine or sometimes with sponging. Do not ask for change of medicine, keep patience and follow your doctor... 
Dr Anuj Rastogi 
Taara Kids 😇