"Dr. Rife discovered that a simple electromagnetic wave was not enough to destroy a microorganism - but a radio frequency wave was readily accepted by the body if it was emitted by a gas within a glass tube."
https://www.biologicalmedicineinstitute.com/royal-raymond-rife
"a radiant gas broadcast unit that could kill dangerous viruses in an animal host."
https://borderlandsciences.org/cart/alt-health/rife-lakhovsky-and-tesla/
"Helium enclosed in a glass bulb with angled electrodes (known as a Phanotron tube) is stimulated into a plasma state (the fourth state of matter) using an audio rate square wave which is used to amplitude modulate a radio freqency (RF) carrier of approximately 27Mhz. The work is an attempt to independently duplicate and varify some of the work from the 1930's by Royal Raymond Rife (see: http://www.rife.org/), brilliant inventor of the "universal microscope", who developed similar plasma devices which were used to setup standing waves inside various pathogenic microorganisms. My research focuses on simple and harmless organisms, including Vorticella, Blepharisma and Paramecium Caudatum. The challenge of the work is finding the right combination of frequenices, RF and audio rate"
https://www.skidmore.edu/academics/music/aholland/PlasmaFive.htm
"The term M.O.R. stands for "Mortal Oscillatory Rate" or the frequency that will devitalize, kill or render harmless the harmful microorganism."
"The correct audio frequencies used in this instrument MUST be combined with an RF carrier frequency"
https://www.rifevideos.com/dr_rifes_true_original_frequencies.html
New Way to Kill Viruses: Shake Them to Death
https://www.livescience.com/7472-kill-viruses-shake-death.html