2nd child always sick

Christina

Ok. My 5 week old is congested from getting sick from his sister. I called the pediatrician and asked him what we can do for it and he told me that my 2nd child will always struggle with congestion since he got exposed so young... I don’t see anything online backing that but, I wanted to see if you guys have heard the same thing from your doctors or have noticed that your 2nd child is always sick?