2. A Deadly Mutating Flu Virus With 99.4% Communicability - The Stand (1994)
Alright, maybe defining Stephen King's adaptation of his own novel 'The Stand' could be considered a little bit cheeky, but despite the fact that it was originally a TV mini-series, with each episode running to 90 minutes, you could argue that it's actually a four movie series. That's in fact exactly what I
am arguing. And of course with the news that Ben Affleck will at some point likely be adapting The Stand into a feature film, this seems like a wholly valid inclusion. King really made Captain Tripp's an airtight destroyer of humanity - a government manufactured flu which mutates constantly, meaning the body cannot produce the correct anti-body and also meaning that a vaccine is practically impossible to produce. Add to that that the symptoms resemble the common cold but kill much more quickly, meaning very few people actually report their illness. To make matters basically cataclysmic, Captain Tripp's is 99.4% communicable, meaning that basically, once it's loose, 99.4% of the population are all but guaranteed to contract it and of course die shortly after. Meaning in short that only .6% of the entire world's population is left alive. Let's hope that The Stand didn't influence any government officials watching, because a virus of that staggering potency would, without a doubt, decimate the planet - maybe not as badly as it does in the TV movie - but still so much so that humanity would literally never recover.