I think it’s a lot more involved than anyone realizes.
I think MANY things are being “tested”... none of which is effectiveness against covid.
There are apparently MANY arms within the study... with everything from nano-tech to Hydra-vulgaris and other blood parasites involved as well.
At the very least, they should certainly know by now just how much graphene oxide the average human can take without just keeling over dead within 72 hours.