Induced hypothermia therapy is one of the treatments Lyme Mexico offers. Joyce could not do this treatment but several others in the clinic would be in there for about 2 hours.
Read more about it here: https://lymemexico.com/project/hyperthermia-induced-therapy/
"Data on extreme hyperthermia shows that combined with the right IV antibiotics, certain borrelia species can be eradicated. The specifics of which are described in the article below. This, however, has not demonstrated to be “the cure for Lyme disease” due to the fact that there are hundreds of strains of different borrelia, and some are less sensitive to temperature elevation. It is also important to know that some borrelia species are highly mutated and can undergo specific changes in their anatomy that make them unimpaired to these therapies". - Lyme Mexico