Picture this, a world full of zombies outside your door. You recognise one. It’s your neighbour, the nice one who always smiles at you when you pass their house on your way back from your daily shop. They stayed inside the past couple of days due to a bug that got passed around and are now banging furiously on your door to feast on your brain. ‘How did this happen?’, you ask. I blame gene editing. Let me explain.

Gene editing—also known as genome editing—is defined as “the manipulation of the genetic material of a living organism by deleting, replacing, or inserting a DNA sequence, typically with the aim of improving a crop or farmed animal or correcting a genetic disorder.” In simpler terms, just like an Instagram influencer might edit a selfie in Photoshop to smooth out some skin imperfections and make their waist appear smaller, scientists have managed to do the same thing to an organism’s DNA strand and in turn modify it to their liking.

Several approaches to genome editing have been developed. A recent one is known as CRISPR-Cas9 (often shortened to CRISPR), a system which has generated a lot of excitement in the scientific community because it is faster, cheaper, more accurate, and more efficient than other existing gene editing methods.

Previous research using CRISPR has shown that it can turn normal fat into energy-burning cells and even led to the world’s first genetically edited babies, ‘made’ by Chinese scientist He Jiankui. Long story short, gene editing and everything that it represents for the future is pretty crazy.

Before we can even look into the risks that come along with genome editing, it’s important we first explain who exactly would maliciously use such scientific progress. Introducing bioterrorism, “the intentional release of viruses, bacteria, or other germs that can sicken or kill people, livestock, or crops.” Whether it might be from reading one too many science fiction novels or binge watching too many apocalypse films on movie night, the looming threat that one day humans will destroy ourselves is ever-present.

As stated in The Conversation, “With recent advances in gene editing, it may be possible for bioterrorists to design viruses capable of altering our behaviour, spreading such a disease and ultimately killing us. And chances are we still wouldn’t be sufficiently prepared to deal with it.”

While we do live in an age of conspiracy theories, wacky theorists may actually have a case here. Allow me to present you zombification—yet another concept horrifying enough to make your heart race.

Currently, the COVID-19 pandemic has shown us just how unprepared we are for, well, everything. I mean, do you remember when people were stacking milk and toilet paper into their shopping carts with party hats taped to their mouths? This War of the Worlds-esque behaviour could in fact become even worse as we start turning into our own horror fiction villain.

What if the real threat wasn’t COVID-19 anymore, but a “gene-edited pathogen designed to turn us into zombies,” straight off the set of The Walking Dead, or “ghost-like, agitated creatures with little awareness of our surroundings?” pondered The Conversation.

In fact, zombification is already present in our world and occurs quite frequently within nature. Perhaps the most well known type is rabies—a contagious and fatal viral disease of dogs and other mammals, transmissible through the saliva to humans and causing madness, convulsions and death.

When it comes to CRISPR, the tech’s ability to edit the human genome with unprecedented precision, replacing one single letter in the DNA—which is very tricky to do by the way—has shown its star power to treat genetic conditions such as sickle cell disease, beta thalassemia, and many others.

But CRISPR could be used for much darker purposes, such as bioterrorism. It has the ability to alter pathogens to make them more transmissible or even worse, fatal. It could also turn a harmless non-pathogen, such as the microbe, into an extremely aggressive virus. The technique even has the capability of altering a virus to make it a dangerous threat to a wider range of species than it currently infects, or make it resistant to antibiotics or antivirals as Pin Lean Lau, a Lecturer in Bio-Law at Brunel Law School, Brunel University London, posited.

You’re probably thinking that a zombie-like disease, if it could be created, surely wouldn’t make the dead pop back out of their graves as reawakened brain-hungry monsters. While you may be right there, an infection passed through saliva with an extremely high transmission and mortality rate, if it caused extreme agitation and destructive behaviour, or even death, wouldn’t be far off from the horror that movie theatres capitalise on every time a new zombie blockbuster comes out. Such a virus travels from human to human without effort, similarly to diseases like the Ebola and Marburg viruses.

With this in mind, it’s not at all surprising that the former Director of US National Intelligence, James Clapper, termed gene editing “weapons of mass destruction and proliferation” in 2016, as first noted in Insider. The Guardian also reported that Clapper had raised fears about “rogue scientists” possibly using this technology for their own maniacal pursuits the same year. In 2018, the US government put its foot down and released its first official bio-defence strategy, which involved a whole host of governmental agencies. The document detailed plans about everything from deliberate bioterror threats to “naturally occurring outbreaks and infectious diseases that escape a lab accidentally.” Even more interesting, the US Department of Defence Strategic Command unit has issued a training programme called CONOP 8888 (Counter-Zombie Dominance), which actually simulates a zombie apocalypse scenario.

Before you lose hope and fall into despair, it’s important for you to be aware of the fact that we do have international law conventions on biological and chemical toxins. In the US for example, there are strict laws that prohibit states from acquiring or retaining biological weapons. But do these really work against these new threats?

In June, a World Health Organisation (WHO) expert committee published two reports—the first offered a series of recommendations around gene editing, and the second set up a framework around governance—in order to put forward a set of ideas around how human genome editing could be governed at the appropriate institutional, national and global level. The framework presented possible regulatory authorities or national guidelines regarding gene editing and similar technological techniques. For example, one section suggested that trusted ethics committees weigh in and review clinical trials and approvals in the area.

It must be noted that the WHO is not in a position to regulate genome editing in individual countries—these are unfortunately only suggestions, as sensible as they may be. Therefore, the fate of the future does lie within individual countries’ judgement to implement these recommendations as part of their own national law—cue the eye roll. I definitely wouldn’t hold my breath either, since another problem is already rearing its ugly head; the guidelines don’t even touch the surface on the issue of safety or efficacy around how to handle gene editing—it was stated that this wasn’t part of the scope of the review.

For now, these recommendations are the closest thing we have to a global framework of governance. As the technology continues to develop, it can only be hoped that they will also evolve accordingly. But ultimately, we may need to think about how to make such frameworks legally binding.

The future may not be entirely bleak, but we might have to start hitting the gym and brushing up on our survival skills—we might even have to start saving if we want to afford a billionaire doomsday bunker one day.