Note also that at best, plants can be tested to be free of the two viruses that the strips test for. That says absolutely nothing about the dozen or more viruses that can infect orchids. Those two seem to be the most prevalent, and commercially important, but to get the others the tests have to be done in a lab. No instant gratification, and a lot more time and expense. So I suspect that truly "virus free" is as unobtainable in orchids as it is in humans. An unhealthy plant can spread diseases other than virus and should likely be pitched if it doesn't help you by committing suicide.
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