This fearmongering is the product of years of zombie fantasies in popular culture. All of it is utter nonsense.
Second that. Though it's not just zombies.
Plagues, both natural and manmade, are a staple of apocalyptic fiction. Current craze is zombies, but they're a recent (and effective) retelling of a very old meme.
Stop me if you've read this one: "PLAGUENAME a (virus/bacteria/prion/plot device) created by (godless researchers/actual god(s)/mother nature/snidley whiplash) swept the globe after (accident/outbreak in the third world/contrived event) killing (millions/billions/everyone but our heroes), and turning our cities into haunting graveyards". When you can make a mad libs version of what is essentially the same story, it's officially become a cliche.
Now, reality time. The worst plagues in recent history were the 1918 flu epidemic and the HIV pandemic, while the worst in ancient history were the black death and smallpox. These are the killers that the cliche above sprung out of. They set the bar.
They aren't even close to apocalyptic. Especially not on a global scale. Even a pathogenic perfect storm is at worst a regional catastrophe.
Is this any surprise? Fiction always takes things further than reality. If the world conformed to our fantasies, we'd have moon cities twenty years ago. Reality is a huge letdown sometimes. Not that that stops people from believing; you could probably make a killing by selling lunar real estate with the promise that it'll be ready in twenty years.
So you get people who think that yes, it really is possible to bring about the end of the human race via pathogen. And those same people will look at something like the 2001 anthrax attack and think the sky is falling, while reality being what it is, the total death toll for that was single digit. The article is pandering to that mindset.