"American scientist Royal Raymond Rife invented the Rife machine during the 1920s and 1930s. The machine he developed produces very low energy electromagnetic waves that are similar to radio waves and undetectable to the human ear.
The device passes electromagnetic frequency through them and into the body.
Proponents of the Rife machine believe that people can treat diseases, such as cancer, by using this device"
https://www.medicalnewstoday.com/articles/325628#rife-machine
"Mortal Oscillatory Rates (MOR) are the frequencies that Royal R. Rife proposed would allow a user of his Rife machines to kill the specific micro-organisms responsible for disease in their host."
https://hatch.kookscience.com/wiki/Mortal_Oscillatory_Rates
"frequencies at which simple viruses could be shaken to death."
"These treatments would presumably be safer for patients than many antiviral drugs that can have terrible side-effects. Normal cells should not be affected by the virus-killing lasers or sound waves because they have resonant frequencies much lower than those of viruses, Sankey said.
Moreover, it is unlikely that viruses will develop resistance to mechanical shaking, as they do to drugs."
https://www.livescience.com/7472-kill-viruses-shake-death.html