We aren't told.
She could have. Polio existed at that time, but wasn't yet identified as such, so even if she had it, they wouldn't have identified it as such. (The book is set before the disease was well known as what it is.)
She also could have had other illnesses.
See eNotes Ad-Free
Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.
Already a member? Log in here.
Further Reading