Does this mean my son has a weak immune system?

[mama to 2 girls]

My ds just got over what I am almost positive was Roseola about a week ago.... He started a fever on a Sunday evening after waking up from a nap that afternoon and not feeling well (he is 2 y.o. BTW) and didn't eat well the rest of the day, he had no other symptoms except a high fever and then Monday morning he wanted to eat and so we let him and then he threw up after I tried to give him something for the fever (I can't remember but I think all I had in the house was infants Advil but he hates taking anything so I think I barely got 1/4 of what he was supposed to have) and said his tummy hurt and I was thinking a stomach bug (eventhough he hadn't been anywhere in 4-5 days) but he never threw up again until Tuesday morning and that was 2-3 times but I noticed a rash that was starting around his neck but didn't think too much about it and then he didn't throw up again but we went to bed (mind you this whole time he hardly ever slept and when he did it was very restless) but he had been very fussy and then about 12:30am he was burning up couldn't hardly get a temp on him but his fever seemed to come and go every 15 mins or so......anyways ended up in the ER because he we couldn't console him and all they did was give him tylenol and zofran and sent us home....I even showed the E.R. doc his rash and he just dismissed it...gggrrrrrr. ANYWAYS.......we took him to the ped. the next day and she said she didn't think it was Roseola only because usually all kids have are the fever and then the rash.??? She did look in his throat and said he did have a bit of tonsillitis... But I did a lot of research online and it said that they can have vomiting and feel bad and his rash looked EXACTLY like all the pics I looked at online...and it started at his neck and worked it's way down his stomach to his groin area and then finally a bit down his arms. He had a fever technically from Sunday evening until Friday mid-day eventhough I suspect the his fever came back on Thursday night-Friday morning was because of his tonsillitis.....I did give him a few doses of Colloidal Silver in the middle of the night and before his nap on Friday and he woke up fine.........My girls who are 6 and 4 y.o. seem to have missed this one BUT I was militant about staying away from him and hand washing. But from what I have read Roseola usually only affects kids up to 3 y.o..

Soooo, if you have actually read this far .....since kids usually only have fever and then a rash and no other symptoms with Roseola does this mean my son has a weak immune system because he got so sick? 

[tanyalynn]

I'd tend to think you'd see other signs that you should be concerned about his immune system.  Does he get sick a lot more than other kids in similar situations, does he usually get sicker with any given illness than other kids seem to?  Do you have to work harder, in general (not just this time) to prevent secondary infections from setting in? 

If it's just one illness that didn't run its course like you'd expect, I wouldn't be concerned.  If you're seeing a pattern, then I'd start looking to various ways that his body could be out of balance that you could work on so that he'll deal with illnesses better. 

[treeoflife3]

My kiddo had roseola as well and she had the fever and then a rash after the fever broke and was otherwise fine besides some throwing up in the middle of the night.  Not as bad as your kiddo but I think the one time thing isn't a sign of a poor immune system.  before this, how many times has he been sick in the past two years?  One bad case of roseola or something similar I think is just a kid getting sick once, ya know?

[Marnica]

No I don't think this is a sign your child has a weak immune system.

Kids get sick and not every child conforms to the expected progression/presentation of an illness yk? Every kid is different. Could that have been roseola, maybe. But lots of viral illnesses present with rashes, so it could have just been a random virus too.

I wouldn't worry unless your child gets sick often and when he does, it's usually more severe than not.

[mama to 2 girls]

In his 2 yr life he has been sick maybe 7 times? I only remember 4 times(including this last illness) really well as he was pretty sick each of those times (but so were his sisters) I'd say that sounds about right but I don't keep track of every little cold he has gotten.... but with that being said I am a germaphobe so when we are out and about I always have germ-x or purell (some type alcohol hand sanitizer) so my kids don't exactly get exposed to too many germs. But I got in touch with my SIL and she said all 5 of her kids have had Roseola and they were all miserable as well.....So it makes me a feel a little better and that maybe it is just in the genes. My mom also said my cousin was pretty sick with it also as a child. 

Thanks so much for your replies!