“any thoughts”
my only thought is that it’s well known that certain formulations of silver used externally can be useful in medicine, for example, silver nitrate solution used as eye-drops in newborns ... however, everything i’ve read from credible sources claim that silver formulations consumed internally are a hoax and a fraud and that if the doses are high enough, even dangerous ...
here’s just one link about argyria:
https://www.webmd.com/skin-problems-and-treatments/argyria-overview#1
I was thinking more along the lines of using graphene embeded with Silver Nanoparticles to make a filter not something taken internally. A reusable antiviral filter you could wash with hot water - lots of different ways one can exploit the materials and fabrication process to filter out the pathogen I theorize