Traditional nano particle products may work, all depending on when, and how long a person has had any particular disease or infection, for example a person that has a two month old infection may recover much quicker than a person that has been struggling with it for a year or more, there are many variables.
It is now a known fact that nano-particles are not effective:
Studies reported by the Rice University prove that Ions, not nanoparticles, make silver toxic to bacteria.
IONS are made from ATOMS by removing or adding proton or electrons, it takes chemicals to make ion colloids, they are usually bromides, phosphates or some other chemical used to break down the silver.
Many companies claim not to use chemicals, yet they have them. The FDA has reported that chemicals from Nitrogen, Acids and even Cyanide's, are used by many colloidal silver producers, yet their Supplemental Facts labels on the back of their products describe incorrect and vague descriptions to avoid disclosure of what chemicals they use.
Due to the Low Parts Per Million Factor of typical colloids plus the large bulky Surface Area, that would be about the same size of the virus, they take much longer to work if they work at all.
You would have to consume gallons and saturate your body with their chemical compounds to get the results you would get with one or two bottles of High Parts Per Million Concentration of atoms.
Saturating your body with chemicals is counterproductive, since you are already getting tons of chemicals from other sources such as prescription drugs, Genetically Modified foods, chemically saturated beauty products along with copper, iron and other noble metal depleting vitamin supplements. Such accumulation of chemicals will produce long term toxic side effects.
Looking at the prescription drug facts on most medical drug labels, you will notice many contain HCL - also known as Hydrochloric Acid, the fact is that one of the side effects HCL is that it causes Hair Loss! Yet there are colloidal silver products on the market than contain Hydrochloric acid, or Hydrogen Peroxide that causes premature gray hair....... yet they claim not to use chemicals!