Jury duty excuse. my experience.

I was able to email the court jury duty persons, state & county both, and just told them of my health issues that would not fit with sitting quietly for long time frames.

Both county & state replied that I was excused..
I didn't even have to provide a Drs letter.
Which surprised me..
but it is worth a try..

Some state/county courts might be more strict in the requirement of a letter.

You may have to contact both your state court & county court, as they are separate systems.. Or save the letter until or if the other court contacts you for jury duty, then send it.