Many of us know exactly what you are trying to explain Give My Daughter the Shot! As Dr Diana says, this condition evolves over time. It is an ever changing condition, probably because as one body system has to ‘adapt’ to accommodate for something going wrong, it has a ‘knock on’ effect on another system, and there we go ad infinitum!
Dr Diana is looking for (and has found) ways of breaking this perpetual decline.
Regards
Barbara
(UK)