First they said it was the heat (only 78 degrees at the event with a nice late summer breeze). Now they claim it's pneumonia. There is no way you treat pneumonia on a 69 year old person by taking them to their daughter's apartment. The elderly (those above age 65) are very susceptible to pneumonia. It can kill. If she truly had this respiratory condition then she would have been taken to a hospital to be checked out as to what kind of pneumonia it was ... viral, bacterial, etc. and been placed on a course of treatment that would take weeks for recovery. You certainly don't release them onto the general public or have them embrace a young child for a photo-op just 2 hours after the health-breakdown episode.
Based upon all the visual thus far, and without having seen her actual health records my best guess is she suffers from parkinson's disease. Everything we have been a witness to over the last year with the former Secretary's health is textbook parkinson's or some other yet undisclosed similar neuromuscular disorder. All the symptoms are there and visible for the trained eye to see.