I don't mean to be a party pooper but - you do realize that a Cide is just like a vaccine in that the host catches the virus, the immune response kicks in and THEN the cide kills off the invader. Once! No need for a second dose, ever, just like with a vaccine. Or is that not true? Not sure but had to present that POV.
However (!!) - like with the flu, I suppose the immune response is only good for that particular version whereas the cide taken would be a multi-clad version - soooo, the next flu caught WOULD require another dose of Multi-clad FluCide. The immune system would only protect against the version caught.
Right??
If so then one would need to ingest ALL the flu strains at once - take the multi-clad FluCide and get relief AND be protected against all those versions in the future by the immune system.
Call it - Pop a multi clad flu Pill - Pop a Cide - lifetime protection.