Umm, your brother got the virus from the vaccine. It's not a matter of it doesn't work, they gave him the virus when he got his shots. It's not rocket appliances, Bubbs
You can buy HCQ and a 3 drug regimen from this website. I know someone who has bought from this site and they had no problems with shipping.
https://medicinevilla.com/product/ziverdo-kit/