If the plant is valuable to you, please get it tested. Keep it isolated from any other orchids you might have.
Make sure you wash your hands after handling it. Sterilise tools throughly (flame them i.e. with a butane torch, or you can soak them in isopropyl alcohol or trisodium phosphate for 15-20 minutes - a simple wipe with alcohol is unfortunately not enough to kill the common Orchid viruses).
It might sound paranoid, but if you have valuable plants, it's far better to be overcautious than not.
