I would love for this to be true, however it may just be a coincidence. Crypto is a parasite while lymphocytes is a viral infection. I am hardpressed to believe lanthanum chloride cured both. If it is so potent then I would imagine we would notice significant changes in the biodiversity of our reef tanks.
And both often resolve on their own over the timeframe of the op.
This is a very strong candidate for post hoc ergo propter hoc