I am curious if i wanted to take a cutting from a plant that has some foliage disease would the cutting that doesn't seem to have any symptoms start having problems later?
Certainly could, but you'll have to try and see.
I'm no expert but my first thought was that I'd be skeered !
One fall I took some very small (like 4") healthy looking tip and sucker cuttings from a plant that was going down to disease. The ideas was to see if I could overwinter them in the house. They did fine in a sunny south window, even set some small fruit in the spring, and eventually were planted back out into the garden. I think the dryer environment in the house was not conducive to whatever fungal diseases the mother plant carried in our cold fall weather, because the cuttings remained healthy. It's worth a try -- you can always toss them out if they start having problems.