Everything Speedy said and maybe get a F125/165 http://www.atelierrobin.net/p30.htm
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Preliminary test show this works but unfortunately takes commitment.
You can slowly choke off the co-infections by zapping with the F125. However I do use the EPFX/SCIO to help with targeting.
For example shingles showed high in my last test, so I need to zap Herpies_zoster.