Rodney,
Read the many texts on this under the links I sent to you. Others offer advice there similar to what I say and if having researched it thoroughly you are happy to go ahead, I wish you the best of luck.
Regarding cross infection, while the risk might be slight from either fish or water, is a risk that I would be unwilling to take.
Do a cost-benefit analysis as you would if you were purchasing any other treatment. For instance ask the following
Is it closely monitored; what Agency oversees such treatment to ensure you as a customer are protected ?
How many sessions will you need ?
What is the cost time wise (taking you from work on a daily basis)?
The cost in financial terms?
How long remission can you realistically expect?and
What risks are associated with it?
If happy, go ahead with it. I'm offering my opinion which is what you requested in the first instance.
BB