Lol I was trying to remember if it was Rife's lab that got burned down along with all his inventions and I was doing a search and of course find this article - https://www.medicalnewstoday.com/articles/325628#evidence

According to a 2013 review, no scientific evidence shows that the Rife machine or other similar devices can treat cancer. The American Medical Association condemned Rife’s experiments at the time, and independent researchers were unable to replicate the claims he made in his work.

Then you actually click the link and read the conclusion:

In summary, our clinical results provide strong evidence that the intrabuccal administration of RF EMF amplitude-modulated at tumor-specific frequencies is safe and well-tolerated and may lead to long lasting therapeutic responses in patients with advanced cancer. Our in vitro experiments demonstrate that cancer cell proliferation can be targeted using tumor-specific modulation frequencies, which were identified in patients diagnosed with cancer. Tumor-specific modulation frequencies block the growth of cancer cells, modify gene expression, and disrupt the mitotic spindle (Figure 6). Studies are underway to dissect the biophysical mechanism leading cancer cells to respond to specific modulation frequencies identified in patients with a corresponding diagnosis of cancer but not to randomly selected or tumor-specific frequencies identified in other tumor types. Elucidation of this mechanism of action is likely to unveil novel pathways and targets.