Information on orchid 'flec' virus

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Hi

I was wondering whether anyone has had issues with 'orchid flec virus'. I have had an issue which at first I thought was a fungus, but after fungicides failed to fix the problem, was told that it may be viral. Out of all my plants, only miltoniopsis, and paphiopedilums do not show symptoms; all of the other plants form 'pitts' on their leaves, as well as yellow discoloration. Some plants die, while others just have severly damaged leaves. Any new plants introduced to the collection develop symptoms after 2-3 months. However, I have three plants at the opposite section of my house, which have remained unaffected.

Has anyone had a similar experience?

Thanks,
Cam