Do you ever wonder what would actually happen if a genetically modified pathogen escaped from a lab and no one could stop it?
That question kept me up at night while reading Annie Jacobsen’s latest book. And I don’t say that lightly. I’ve read plenty of doomsday scenarios, but this one felt different. It felt real. Because it is real.
Overview
Biological War: A Scenario (Dutton, July 28, 2026) is investigative journalist Annie Jacobsen’s follow-up to her bestselling Nuclear War: A Scenario. This time, she turns her attention to an even more insidious threat: genetically modified biological weapons.
The book opens with a lab accident at Russia’s Vector Institute in Siberia, a real facility that actually stores smallpox, Ebola, and other nightmare pathogens. A genetically engineered strain of pneumonic plague escapes. Within days, it spreads from Siberia to a discotheque in Frankfurt, a cruise ship in the Pacific, a homeless camp in Los Angeles, and an aircraft carrier in the South China Sea.
What follows is a minute-by-minute account of societal collapse. Not in weeks or months. In days.
Jacobsen interviewed dozens of experts for this book: former presidential advisors, CIA counterproliferation officers, FEMA administrators, CDC directors, bioweapons scientists, and military commanders. The result is a work of narrative nonfiction that reads like a thriller, except every horrifying detail is grounded in fact.
Who will actually love this book? If you’re fascinated by national security, biodefense, or the intersection of science and geopolitics, you’ll devour it. If you’re prone to anxiety about existential threats, proceed with caution, this book will scare your pants off, as the Boston Globe put it. If you’re looking for hopeful solutions, you won’t find them here. Jacobsen isn’t offering comfort. She’s issuing a warning.
Table of Contents
1. Introduction
Book: Biological War: A Scenario
Author: Annie Jacobsen
Publisher: Dutton (Penguin Random House)
Publication Date: July 28, 2026
Annie Jacobsen is no stranger to the dark corners of American power. She’s a Pulitzer Prize finalist in history (for The Pentagon’s Brain), a New York Times bestselling author, and a former contributing editor at the Los Angeles Times Magazine. Her previous books include Area 51, Operation Paperclip, First Platoon, and the blockbuster Nuclear War: A Scenario, which was shortlisted for the Baillie Gifford Prize and became one of the most talked-about books of 2024.
Context
Biological War sits at the intersection of investigative journalism, national security analysis, and what Jacobsen calls a “scenario” – a speculative but rigorously researched narrative of how a catastrophic event could unfold. This isn’t science fiction. The pathogens exist. The labs exist. The weaponization programs exist. Jacobsen simply connects the dots and asks: what if something went wrong?
Purpose of Biological War
The book’s central thesis is stark and uncompromising. As Jacobsen writes in the prologue:
“Biological warfare is illegal. Biological weapons are illegal. And yet biological weapons exist. The biological weapons that exist include genetically modified weapons designed for hypervirulence and human-to-human transmission. Weapons with a high lethality rate, and no known cure.”
The purpose of Biological War is to make readers understand that this isn’t a hypothetical threat – it’s a present danger. And unlike nuclear war, which would be catastrophic but relatively quick, biological war would be “a long, painful, slow death,” as former Senate Majority Leader Tom Daschle tells Jacobsen. “Death physically. Death governmentally. Death in virtually every context.”
2. Background
To understand why Biological War is so terrifying, you need to understand the history Jacobsen lays out in the book’s first section.
The story begins in 1971, when biochemist Paul Berg conducted the first gene-splicing experiment at Stanford University. He created recombinant DNA by combining genetic material from two different viruses. It was a breakthrough that would revolutionize medicine – and also open the door to biological weapons of unprecedented power.
In 1972, the Biological Weapons Convention was signed, prohibiting the development, production, and stockpiling of biological weapons. The treaty has 163 states-parties today. But as Jacobsen documents, the Soviet Union signed the treaty while simultaneously expanding its secret bioweapons program – a program code-named Biopreparat.
This program employed as many as 65,000 people at its height. Its goal? To create genetically modified pathogens that could kill millions while leaving infrastructure intact. As one Soviet bioweapons engineer put it: “The plan was to kill all the people and leave the infrastructure intact.”
The Soviets developed plague strains that were antibiotic-resistant. They experimented with chimera weapons, combinations of two different pathogens in one organism. They even inserted an endorphin gene into plague bacteria to make infected people feel euphoric, so they would go out and socialize instead of staying home.
When the Soviet Union collapsed in 1991, the full scope of Biopreparat became known to the West. But the threat didn’t disappear. According to a 2025 U.S. State Department compliance report, Russia “maintains an offensive BW [biological weapons] program” in violation of the treaty, while China and Iran are engaged in activities that raise “unresolved compliance issues”.
Meanwhile, the number of Biosafety Level 3 and Level 4 laboratories around the world has exploded. A 2025 global survey identified 110 BSL-4 labs in 34 countries and 3,515 BSL-3 labs across 149 countries. Each of these facilities handles the world’s most dangerous pathogens. Each is a potential source of a lab leak.
3. Biological War Summary
Let me walk you through what actually happens in this book. Because the devil is in the details, and Jacobsen spares no detail.
The Inciting Incident
The scenario begins with an explosion at the Vector Institute in Koltsovo, Siberia, a real BSL-4 facility that stores smallpox, Ebola, Marburg, and other nightmare pathogens. In the book, a scientist tries to destroy his work on a genetically modified plague weapon. The attempt backfires. The lab explodes.
A genetically engineered strain of Yersinia pestis, the bacterium that causes plague, escapes.
This isn’t ordinary plague. This is a weapon. It has been engineered for hypervirulence, human-to-human transmission, and antibiotic resistance. It has a 100 percent fatality rate if left untreated. And it has been spliced with an endorphin gene, so infected people feel euphoric during the incubation period, meaning they go out and socialize instead of isolating.
The Transmission Chain
Jacobsen traces the spread of the pathogen with terrifying precision.
Generation Zero: The Vector scientist who caused the explosion infects himself. He goes to confess at a small Orthodox church in Koltsovo.
Generation One: The priest and a university student breathe in the plague particles suspended in the church’s air.
The student flies from Siberia to Los Angeles. On the way, he feels fantastic, the euphoria gene is working. He visits Skid Row to do pro bono work and infects dozens of homeless people.
Meanwhile, the Vector scientist wanders into the Siberian forest and collapses. A group of ten big-game hunters find him. One of them, a tech entrepreneur from the Dominican Republic, administers CPR – directly inhaling a massive dose of plague bacteria.
Generation Two and Beyond – The hunters fly home to six continents. The tech entrepreneur and his sons go to a crowded gym in Santo Domingo. The eighty-year-old German judge boards the Diamond Princess cruise ship. The Texas oilman flies to Dallas. The Vietnamese hotel owner infects two U.S. Navy sailors, who return to the USS Theodore Roosevelt.
Within days, the pathogen is on every continent except Antarctica.
The Response, or Lack Thereof
This is where the book gets truly disturbing. Jacobsen shows, in excruciating detail, how the U.S. government would respond to such a threat – and why that response would fail.
Day One: The National Reconnaissance Office spots the explosion via satellite. The NSA intercepts Russian communications. The CIA reaches out to a deep-cover asset at Vector. But no one knows what pathogen has escaped. The Russians lie about what happened, claiming it was just a routine accident.
Day Two: Russian officials finally admit there’s an outbreak of “atypical pneumonia” in Novosibirsk. The case fatality rate is 25.8 percent – far higher than Covid’s 1 percent. The U.S. intelligence community realizes this is a biological weapon. But without a pathogen sample, they can’t confirm anything.
Day Three: The White House is briefed. The president asks the obvious question: “Why am I just learning about this?” The answer: because there’s no homeland defense against a large-scale biological attack. As Dr. Thomas Ehrhard, a retired Air Force colonel who designed biological war games for the Pentagon, tells Jacobsen: “Very much like nuclear war, there is no real homeland defense against a large-scale biological attack, only things you can do to mitigate extermination.”
Day Four: The pathogen reaches Los Angeles. Homeless people on Skid Row start dying. But because the CDC’s BioSense surveillance system doesn’t track data from homeless clinics, no one notices. The outbreak is initially mistaken for a mass fentanyl overdose.
Day Five: The U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) at Fort Detrick confirms the pathogen is genetically modified plague. The president is moved to an undisclosed location. Devolution – the secret transfer of power to backup leaders and hidden command centers – is activated.
Day Six: Martial law is declared. The internet is shut down. The Strategic National Stockpile is overrun by desperate citizens. And the scientists at USAMRIID make a horrifying discovery: the plague is a chimera weapon. If you take antibiotics, you trigger a secondary infection – Venezuelan equine encephalitis – that causes your brain to swell and kill you.
The Chimera Weapon
This is the book’s most disturbing revelation. During the Cold War, Soviet bioweapons engineers worked on a program called “Bonfire” – an effort to create what they called “chimera” weapons: combinations of two different pathogens.
The idea was simple and diabolical. You infect someone with plague. They take antibiotics, thinking they’ll be cured. Instead, the antibiotics trigger a secondary infection – a neurotropic virus like Venezuelan equine encephalitis – that attacks the brain.
As former Soviet bioweapons engineer Sergei Popov explained: “A double agent [weapon], like plague and encephalomyelitis virus, could be combined in one.”
The goal wasn’t just to kill people. It was to destroy trust in medicine, in government, in science. To make Americans lose faith in everything. To sow chaos and insurrection.
And in Jacobsen’s scenario, it works.
4. Biological War Analysis
This book is a masterpiece of investigative journalism. It’s also one of the most unsettling things I’ve ever read.
Dwight Garner of The New York Times called it “more pulverizing than a Kathryn Bigelow movie” and noted that “Day Six is about as far as civilization gets”. The Observer described it as “even more ghastly and perversely thrilling than Nuclear War”. The New Yorker called it “a persuasive and unnerving argument”.
I agree with all of that. But I also have some reservations.
What Works
First, the reporting is extraordinary. Jacobsen interviewed dozens of current and former officials – including a former FEMA administrator, a former assistant secretary of defense, a former CIA counterproliferation chief, and a former Senate majority leader. The level of access she secured is remarkable. As the New York Times noted, “That so many were willing to talk to her, and have their names affixed to this book, indicates the esteem in which she is held.”
Second, the narrative structure is gripping. The book moves like a meteor, as Garner put it. Jacobsen uses short, punchy sentences and a ticking-clock format that makes it almost impossible to put down. I blew past my subway stop reading this book – and I wasn’t alone.
Third, the “History Lessons” interspersed throughout the narrative provide crucial context. Jacobsen explains the 1975 Asilomar Conference on recombinant DNA, the 1979 Sverdlovsk anthrax accident, the Soviet Biopreparat program, and the real-world 2019 explosion at Vector – all in accessible, digestible chunks.
What Doesn’t Work
That said, the book has its critics, and some of their points are valid.
Heidi Vierow, a retired CIA Clandestine Service officer reviewing for The Cipher Brief, argues that Jacobsen imagines “the most extreme of extreme circumstances”. In her scenario, every system fails at once. No backup plans work. No safety mechanisms function. Everyone abandons their posts simultaneously. “Is this possible?” Vierow asks. “Perhaps it is, but the circumstances are so far-fetched that the proposal loses credibility.”
I think this criticism is somewhat unfair. Jacobsen is writing a scenario, not a prediction. She’s showing what could happen in a worst-case situation – and the whole point is that we’re not prepared for even a moderately bad situation. But I understand the concern. When everything goes wrong at once, it can feel less like reality and more like a disaster movie.
Vierow also criticizes Jacobsen’s prose style: “Short sentences, sentence fragments, and one-sentence paragraphs create choppy arguments. Unnecessary explanations clutter her text.” I can see this point. Jacobsen’s style is not for everyone. It’s breathless and relentless – which works for a thriller but can feel exhausting over 432 pages.
The New Scientist review was more measured, calling Biological War “merely a good book” compared to the “truly great” Nuclear War. I don’t entirely agree – I found both books equally compelling, but I understand the distinction. Nuclear War had a tighter, more linear narrative. Biological War is messier, because biological threats are messier.
Does It Fulfill Its Purpose?
Yes. Unequivocally.
Jacobsen set out to show that biological warfare is an existential threat we’re not prepared for – and she succeeded. The book is a wake-up call for policymakers, national security professionals, and ordinary citizens alike.
But I also think the book raises questions it doesn’t fully answer. What should we do about this threat? Jacobsen offers few solutions. She shows us the abyss and leaves us standing at the edge. That’s a valid journalistic choice, but it can leave readers feeling helpless rather than empowered.
5. Strengths and Weaknesses
Strengths
Unmatched Access: Jacobsen interviewed an extraordinary range of experts, from CIA officers to FEMA administrators to bioweapons scientists. The book is built on a foundation of primary sources.
Rigorously Researched: Every claim is sourced. Every scenario is grounded in reality. This isn’t fearmongering – it’s journalism.
Gripping Narrative: The ticking-clock format makes the book almost impossible to put down. It reads like a thriller, but every detail is true.
Contextual Richness: The “History Lessons” provide essential background, making the book accessible to readers who aren’t national security experts.
Weaknesses
Overly Extreme Scenarios: Some critics argue that Jacobsen imagines worst-case scenarios so extreme they strain credibility. Every system fails at once. Every backup plan falls apart. This may be possible, but it feels like a stretch.
Exhausting Prose: The short sentences and fragments can feel choppy. Some readers may find the style more tiring than thrilling.
Limited Solutions: Jacobsen shows us the problem but offers few answers. The book is a warning, not a roadmap.
Outdated Sources: Some of Jacobsen’s interviewees haven’t served in their positions for decades. While this doesn’t invalidate their expertise, readers may wonder why she didn’t interview more current officials.
6. Comparison with Similar Works
If you’ve read Jacobsen’s Nuclear War: A Scenario, you’ll recognize the formula: a meticulously researched scenario, a ticking-clock narrative, and a bleak conclusion. But Biological War is different in important ways.
Nuclear war is fast. A nuclear exchange would unfold in minutes or hours. Biological war is slow – a “long, painful, slow death,” as Tom Daschle puts it. It would take days for the pathogen to spread, weeks for society to collapse, and months or years for the death toll to mount.
Nuclear war is visible. You can see a mushroom cloud. You can track a missile. Biological war is invisible. By the time you know you’re a victim, it’s already too late.
Nuclear war has deterrence. Mutually Assured Destruction (MAD) worked – at least so far. Biological weapons have no equivalent. You can’t deter a lab accident. You can’t deter a terrorist with a homemade bioweapon.
In terms of other books in this space, Biological War sits alongside Richard Preston’s The Demon in the Freezer (about smallpox), David Hoffman’s The Dead Hand (about the Soviet bioweapons program), and Laurie Garrett’s The Coming Plague.
But Jacobsen’s book is unique in its use of the scenario format – blending journalism with speculative narrative to create something that feels both urgent and immediate.
7. Conclusion
If you care about national security, public health, or the future of civilization, you should read this book.
If you work in biodefense, emergency management, or public policy, you need to read this book. As the Spectator put it: “Read this book. It is a better briefing on the problem than the one we received in Downing Street six years ago.”
If you’re prone to anxiety about existential threats, proceed with caution. This book will scare you. It’s meant to.
Final Thoughts
Biological War is not a pleasant read. It’s not meant to be. It’s a warning – a meticulously researched, deeply unsettling warning about a threat we’re not prepared for.
Jacobsen ends the book with a bleak epilogue. In the aftermath of the plague, the survivors are mostly soldiers – mostly men – who refused to take off their gas masks. “It is not the fittest who survive,” she writes, “but those who refused to take off their gas masks. People with the discipline to never remove their respirator, even when they sleep.
People willing to live alone, and to remain alone. People prepared to kill from a distance, even before knowing if the person they were killing was infected or not.”
She concludes: “These are the traits of the people who will repopulate the world after a large-scale biological weapon is released. Machiavellians, solipsists, and psychopaths. Not a hopeful foundation for a future civilization. Rather, a new world born of paranoia and fear.”
That’s not the ending anyone wants. But it’s the ending Jacobsen’s research points toward. And that’s why this book matters. Not because it’s comforting, but because it’s true.
