Every hospital on the planet used to have Tesla derived frequency devices to heal everything. These have been written out of history.

https://collectmedicalantiques.com/gallery/alternating-current

My favourite device, the Scenar/Pain genie:

Most of the practitioners in these videos will do consultations and treatments. Write to clive@clivedecarle.com for their details

Spooky, the affordable Rife machine:

Spooky Part 2