If your valuable plant is infected by a virus we have the technique to eradicate the virus. Normally the plant meristem grows faster than the virus infection can spread. This way the meristem is the only part of the plant that is potentially virus free.
By giving the tissue culture plants a special treatment and cutting the ultimate tip of the meristem it is possible to generate virus free plants. We routinely do that for Lily but also with other crops like Impatiens, Physalis, Diascia etc. we have been succesfull.