"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"

"Rife hypothesized that a number of bacilli were causal factors in many diseases, especially cancer. In the mid 1930s, he developed a microscope[11] able to see these bacilli and invented the Rife Frequency Generator, commonly called Rife Ray Machine, which he claimed could diagnose and eliminate diseases like cancer by tuning into electrical impulses given off by diseased tissue. The American Medical Association condemned Rife's experiments."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3845545/

"According to a 2013 reviewTrusted Source, 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."
https://www.medicalnewstoday.com/articles/325628#evidence