Daphne/Berberis/Kerria - rust?

Following on from my post about five minutes ago https://forum.gardenersworld.com/discussion/1032846/something-seriously-wrong-with-these-plants#latest
I then found the post about rust on kerria.  The berberis and daphne I was asking about are right next to a kerria which interweave them, and I've just checked, it has rust on it.  Is there any chance the rust has transferred to the daphne and the berberis and it is having a worse effect on those two plants? 
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