Mass killing pandemic like that would not happen due to knowledge we have now about viruses, better hygiene and better nutrition. Food shortages were rampart and vast amount of population was suffering from heavy malnutrition, so after 4 years it would be hard to have a robust immune system. Your argument boils down to fear mongering.
i didn't say it would happen, thus no fear mongering, merely making the joke that IF it were to happen, kev, like most sane people, would be happy to take any proposed cure.
i suspect, when the next super-flu evolves, that, like most modern ailments, it will still take a bite out of the 1st world, yet will concentrate most of the pain further down the food chain in places that, yes, have worse sanitation and generally much greater poverty.