Introduction
Every transformative biotechnology, while unlocking immense potential, inevitably stirs deep concerns over unknown risks. When it comes to phages, they are far from the arch-villains in biochemical crisis fiction; instead, they are unsung pioneers advancing scientific progress.
A recent study conducted by Stanford University and the Arc Institute in the United States has sparked global public debate. Using Evo, an AI large language model (short for evolution), researchers generated hundreds of complete phage genomes and successfully revived 16 AI-engineered phages capable of killing Escherichia coli in the lab. Some of these phages even outperformed their natural counterparts in bactericidal activity.
News of the research quickly raised alarm among many readers: Can AI create viruses now? Could they spiral out of control?
Admittedly, this is nearly everyone's first thought. Pairing virus with AI inevitably brings to mind the biochemical disasters depicted in sci-fi films. What makes this breakthrough more striking is that AI directly wrote entirely novel viral genomes. By comparison, previous work modifying or recombining existing viral genes seems almost trivial.
Yet if we look back through scientific history, every revolutionary biotechnology has brought great promise alongside profound worries about unforeseen hazards. And phages, once again, are not the villains of biochemistry disaster stories — they are veteran contributors to scientific advancement.
Phages: Life-Saving Viruses and Nobel Prize Powerhouses
Phages are viruses, so why are they not listed as human infectious pathogens? The reason is straightforward: phages cannot infect humans. In other words, they are non-pathogenic to people, a special group of viruses that target only bacteria. Over the past century, phages have served both as a former primary therapy and a rising star for bacterial infection treatment, and their contributions to biology extend far beyond what we imagine.
In 1952, experiments with phages definitively proved that DNA, rather than proteins — the prevailing belief at the time — carries genetic information. This discovery laid the cornerstone of molecular biology.
The protagonist of this current public debate is the full genomic DNA sequences of phages generated by AI; DNA is the core code of living organisms.
Later, while studying interactions between bacteria and phages, scientists uncovered two more Nobel-worthy discoveries: restriction endonucleases and DNA ligases, known respectively as molecular scissors and molecular glue. These became foundational tools for genetic engineering.
Subsequently, researchers found that bacteria possess an even more sophisticated adaptive immune system — better known to us as CRISPR. The scientists who discovered this system were also awarded the Nobel Prize. This groundbreaking technology drastically boosted the efficiency of gene editing and enabled a wave of breakthroughs in gene therapy.
None of these emerging technologies triggered mass public panic at their inception. Most work remained at the basic research stage, where scientists used phages as laboratory tools to decipher the rules of life. Few people even heard about these advances. Public anxiety only arose when these tools were deployed to actively modify organisms.
The 1975 Conference: Striking Parallels with Today
In the early 1970s, after tools such as restriction endonucleases matured, scientists began splicing DNA from different sources together — the birth of recombinant DNA technology.
Fears soon followed: could we accidentally create uncontrollable superbugs?
Public anxiety ran high at the time, with many fearing doomsday scenarios reminiscent of The Andromeda Strain, the sci-fi thriller novel. The scientific community was also shaken. In 1974, a group of scientists including Nobel laureates voluntarily called for a moratorium on certain experiments. The next year, they convened at the Asilomar Conference in California, USA, to openly discuss risks and ultimately establish stringent biosafety levels.
As we now know, recombinant DNA technology did not destroy the world. Instead, it gave rise to the modern biotech industry, bringing us life-saving innovations such as recombinant insulin, genetically engineered drugs and gene therapies. The Asilomar Conference is remembered not for stopping dangerous technology, but for demonstrating a rational response framework: scientists acknowledged risks, held open discussions and established regulations, rather than resorting to blanket bans or panic.
AI Phages Today: What's Different from the Past?
What researchers have achieved this time is using AI to generate complete, functional phage genomes in one go. This is truly a transformative advance. Earlier work mostly modified or assembled existing genetic sequences, whereas AI can now directly write entirely new, synthetic non-natural genomes.
This shifts the focus of concerns: AI's powerful ability to learn and create may amplify the risk of generating doomsday pathogens. Newly generated sequences could potentially bypass existing screening checks, presenting genuine technical challenges that demand serious attention.
Yet we must also keep the facts in perspective: researchers intentionally selected phages that only infect bacteria and cannot infect humans. Training datasets excluded viral sequences capable of infecting humans, animals or plants. The current revival success rate (~5%) remains low. This is essentially a proof-of-concept study, not a mature technology for arbitrarily manufacturing hazardous viruses.
What History Teaches Us
Nearly every major leap in scientific capability throughout history has been accompanied by similar swings in public sentiment. At the end of the 19th century, people feared electricity would leak and harm humans. When nuclear technology first emerged, it promised boundless energy while evoking fears of annihilation. Once gene editing matured, ethical debates immediately erupted over designer babies.
Panic itself is not entirely negative; it represents society's natural response to new technologies. The real dangers lie at two extremes: dismissing risks and rushing development blindly, or being consumed by fear and stifling technologies with immense beneficial potential.
Phage research has previously delivered world-changing tools including restriction endonucleases and CRISPR. Today, AI-designed phages hold promise to help us tackle the worsening antibiotic resistance crisis — a well-documented threat that can affect anyone and kills more than one million people every year through superbug infections.
The key is to place new technologies within a transparent, regulated and supervised framework. We must first fully understand risks before deciding how to move forward.
History repeatedly shows humanity achieves safety not by halting technological progress, but by understanding, regulating and deploying technology wisely.
This time will likely be no different.
Author: NG
Editor: C
Translated: Doubao
