Here is a new one on the radar... H2O2 with a nebulizer!
A 3% Hydrogen Peroxide with saline mixture. Or... another variant is a Hydrogen Peroxide with a humidifier misting. A quick search for this will yield some information. Obviously you have to have a very strict control of the hydrogen peroxide content. But, some interesting info online about it. There was some information about Budesonide treatment as well. Keep in mind that the H2O2 will generate ZERO dollars/pesos to the drug manufacturers so it will never be studied!
A Detroit doctor has been using it since last Spring.
https://www.revolutionhealth.org/nebulized-hydrogen-peroxide/
https://www.spiritofchange.org/nebulized-peroxide-a-simple-remedy-for-covid-19/