In my experience they do not. Symptoms will go away only to return later, maybe next year with a little cooling. That was my experience with burmese. I've only had one RI with balls, years ago. The adult male was still in quarantine when he showed signs, after treatment he seemed fine. The next winter just as we were starting to cool it returned. I put him in another room and raised the heat, in a week or so he died. If there is another with RI they will be removed and never return. Better safe than sorry, Mike

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