There is a STRONG motive for hiding from the voters - a physical frailty that shows up in public is very bad for photo-op situations.
The stumble while being thrown into the waiting SUV while leaving the 9/11 ceremonies in New York were the source of one of the bigger hits her popularity standing took recently.
If people don’t see you falling down, it did not happen.
I've had pneumonia several times. NO WAY I could have been happily walking around outside just a few hours after it first hit hard. I was usually off my feet for 4 days.
She did not “stumble,” because she wasn’t walking. She was being dragged—sheer dead weight. Then they dropped her.