Preemies more ill as toddlers?

My twins were born at 32 weeks, they are fine in every way, discharged from the ped at 12 months, they are now 20 months.



They are always ill.



I mean chest, throat, ear infections, colds nothing too major, but they seem to get over one and a couple of days later get ill again. They pass it to each other (sometimes us parents too) and it seems to escalate pretty quickly.



Their diet is good, they have vitamins & iron, we do go to a lot of groups which I know expose us to germs, but I figure if I don't do it now they'll always be sick once they start school plus they love the groups, it helps them to develop & helps me to stay sane.



But them being ill all the time is getting me down, and it's hard work! When they're miserable they're mean to each other, clingy, screaming etc. I use nurofen and calpol, I go to the doc but not til they've been ill for a few days and I know it's bad cos I feel like we're always there, and when they go on antibiotics it upsets their tummies, plus lots of antibiotics cannot be good for them either.



I'm wondering if anyone else with a preemie knows if it's anything to do with them being early, or if it's just what some kids are like.



Thank you



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