The rash lasted in some form or another for another few months before fading away.
It never seemed to cause her any discomfort so we did not make a big deal about it.
I will say that I felt that the Aveeno products we were using did not help the situation and actually in my opinion slightly aggravated the rash.
This issue with the Aveeno only lasted as long as the rash though, we have used the shampoo and body wash since then without incident.
What we primarily used to wash in lieu of the Aveeno were the Mustela products which I was happy with.
Our son is now 7 months old and has been using Aveeno pretty much the whole time and has not experienced any rash like his sister's to date.