Flu are truly scary causing deaths throughout childhood with increased survival around two years and then again around five years. My youngest turns five this month. Before she was two she was hospitalized with croup and she has had a rougher ride with illness than my other kids along the way too.
Other special populations of children include those with AIDS, CF, DM, and any other immunocompromising condition or respiratory anomaly.
Having addressed the special populations that are implicitly not the targets of broad comments:
Typical children tolerate colds just fine. It’s not the flu.
(Croup is also not a cold.)
I appreciate you being complete here, though your opening also reads like you are doubling down on your previous response.
Your comment about croup is also bizarre, as the paragraph I included mention of it in is not about colds. Context matters.