My son is 3.hes woke up this morning full of a cold and slight cough. Every time he gets a cold without fail he ends up really poorly with a chest infection. I've tried plenty to prevent it from turning into one in the past but it always does. Last time I took him to the doctors as soon as he got his cough in hope they would know what was coming and treat before he felt really poorly, but they wouldn't he then ended up dreadful. What I'm asking is does anyone know a way to prevent a chest infection before they have one?