People are not comprehending what proteins are! Billions of combinations exist. Enzymes, catalysts, acids, bases, soaps, solvents, buffers, coatings, oils, anything !  myriad specificity can be engineered.   If people think that colds/flu cannot be emulated/approximated then they are deleteriously uninformed.   They provide perfect cover hiding chemical attack, as does pcr testing which directs to purely biological causation!     Think on. (emr
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