My wife who is a allergic asthmatic, has nebulized CS to stop lung infections and then swished a small amount of CS under her tongue and then swallow. This has stopped infections and flu/colds. Using CS externally on infections works but needs to come into contact with the infections to help. To help take care of MRSA the CS must be i contact with it. If you could put CS into the bubbler of the O2 line there would be CS getting into him.