It is a great filtering material, though.
If you put it under a good microscope, you will see the skeletal remains of plankton (diatoms) usually composed of silica (quartz). The lattice like structure makes diatomaceous earth a great filtering material, and it is also used a a carrier for pyrethrum as an insecticide/repellant (The pyrethrum is derived from chrysanthemums and is the active ingredient, the diatom structures irritate insects and work into the joints in their exoskeleton).
If you were looking for a chelating agent, zeolites might work better, but even that is likely ineffective against a virus (more useful for capturing positively charged metallic ions and heavier metals).
While it probably won’t kill the virus(it is rumored to kill bacteria, parasites and fungi and also to remove toxins and heavy metals)I wonder if daily intake over a long period of time could help with immune response.
It probably can’t hurt to try...
DE is also rumored to make ones body inhospitable to cancer.