Book summary “Flu”: summary

Introduction

You live under the constant shadow of invisible pathogens that can kill millions in a matter of months. When an unstoppable respiratory illness strikes, panic spreads faster than the infection. You wonder how medical science could be utterly helpless against a microscopic enemy.

Gina Kolata explores the terrifying history and eventual scientific conquest of the world's most lethal infectious disease in Flu. The book traces how the catastrophic 1918 influenza pandemic wiped out tens of millions of people in a single year, targeting healthy young adults while baffling physicians.

You will discover how researchers spent decades chasing false leads, why a massive 1976 immunization campaign ended in political disaster, and how modern molecular virology finally resurrected the lost virus from frozen corpses.

• How did the 1918 virus kill its victims so quickly?
• Why did historical epidemics fade from public memory?
• What caused the disastrous 1976 swine flu vaccine rollout?
• How did scientists reconstruct an extinct pandemic strain?

1. The Plague Year and the 1918 Disaster

The 1918 influenza epidemic was uniquely lethal, killing more people in a single year than any other disease in history and drastically dropping U.S. life expectancy. Worldwide deaths reached an estimated 20 million to more than 100 million. Historian Alfred W. Crosby noticed that U.S. life expectancy plummeted from fifty-one years to thirty-nine years in 1918.

The 1918 influenza epidemic emerged in two distinct waves, killing tens of millions of people globally and overwhelming medical systems that possessed no effective treatments.

Unprecedented Mortality

The first wave in the spring was mild and easily overlooked. It caused a three-day fever that was highly contagious but rarely fatal. King Alfonso XIII and eight million people in Spain fell ill during the spring wave. The Grand Fleet of British King George V had 10,313 men sick in May.

The second wave in the fall returned as a catastrophic killer. Unlike normal flu strains that target the very young and elderly, the virus struck down young, healthy adults in a W-shaped death curve. Victims often died from drowning as their lungs filled with fluid.

Camp Devens and Social Collapse

Military training camps became breeding grounds for the second wave due to extreme overcrowding. At Fort Devens in Massachusetts, built for 35,000 men but holding 45,000, doctor Roy and medical luminary William Henry Welch witnessed troops dying at a rate of about 100 deaths a day. Bodies were stacked like cordwood as 8,000 men overflowed a hospital built for 2,000. Patients suffered from rapid cyanosis and mahogany spots on their cheekbones.

Municipal infrastructure collapsed completely under the sudden surge. In Philadelphia, 200,000 attendees gathered for the Liberty Loan Drive parade. Nearly 11,000 people died within a month in Philadelphia, with 759 dying on October 10, 1918 alone. Morgue corridors left bodies piled three and four deep.

Isolated communities suffered near-total mortality rates. At the Teller Lutheran mission in Alaska, seventy-two out of eighty residents died within a three-week epidemic. Miners used hot steam to thaw the permanently frozen ground for a mass trench grave six feet underground.

Medical professionals possessed no effective medicines or understanding of viruses. Thomas Wolfe watched helplessly as his twenty-six-year-old brother Ben died a painful death of suffocation. Doctors could offer nothing beyond basic palliative care.

Medical treatment during the outbreak relied on basic support:

• Provide the patient food
• Provide fresh air if possible
• Administer TLC

2. Historical Plagues and Collective Amnesia

Historical epidemics acted as evolutionary filters. They favored genetically resistant individuals in a classic Darwinian struggle.

Extreme plagues reshaped human populations long before 1918.

In 431 B.C., the plague of Athens brought lawless extravagance. Citizens hurled themselves into rain tanks seeking relief from unquenchable thirst. Rich men suddenly died while the poor seized their properties.

The Black Death devastated Europe between 1347 and 1351. The bacterium Yersinia pestis arrived in Crimea in 1346. It killed at least a third of the European population.

Agnolo di Tura of Siena recorded that half the city's population died. Victims swelled beneath the armpits and groins. Giovanni Boccaccio described in the Decameron how people dragged rotting corpses outside their doors like garbage.

Nineteenth-century cholera epidemics sparked a public health revolution. Vibrio cholerae killed at least 140,000 people in Britain during the wave that started when William Sproat fell ill in October 1831.

Practical sanitation rules emerged from these disasters:

• Keep flies away from food
• Wash your hands before handling food
• Give your babies milk, not beer
• Quarantine the sick

The 1918 Influenza Amnesia

The 1918 influenza epidemic became America's forgotten pandemic.

Despite killing millions globally in under a year, prominent figures barely mentioned it. At Fort Devens, Dr. Victor C. Vaughan witnessed rows of dying young soldiers with blood-stained sheets and dark skin. He dedicated only a single paragraph to the scene in his 1926 memoir.

Alfred W. Crosby documented how textbooks almost entirely ignored the pandemic. Society preferred to push the devastating event into collective oblivion.

3. From Sailors to Swine

Transmission Failures and Swine Flu

Early attempts by Navy doctors to deliberately infect healthy human volunteers with the 1918 flu via mucus, blood, and direct exposure failed entirely. Sixty-two prisoners from Deer Island were tested in Boston, and fifty sailors from Yerba Buena were tested at Angel Island, with identical negative results.

Richard Shope discovered that swine influenza emerged in pigs simultaneously with the 1918 human pandemic and required both a virus and a bacterium to cause severe disease.

Hogs in the Midwest fell ill in the autumn of 1918 after the Cedar Rapids Swine Show, leading inspector J. S. Koen to declare it the same disease as human flu. Shope found that filtering mucus allowed a tiny agent to pass through, but filtering alone only caused mild symptoms. When he combined the filtrate with Hemophilus influenzae suis bacteria, the pigs developed severe influenza and pneumonia through synergistic action.

Tracing the 1918 Virus

British scientists successfully isolated the human influenza virus by using ferrets as susceptible laboratory animal models. Wilson Smith contracted the flu himself after a sick ferret sneezed in his face, isolating a strain designated as WS.

Antibody analysis of 1918 flu survivors proved that the human 1918 pandemic virus survived and persisted in pigs as the swine influenza virus.

Thomas Francis in 1952 found zero swine flu antibodies in people born after 1924, while they were prevalent in those born between 1915 and 1918. Shope tested the blood serum of people alive during 1918 and those born after in a total group of 112 people. He discovered that 35 people had antibodies blocking the swine virus but not the human virus.

4. The Alaskan Permafrost Expedition

In 1936, scientists discovered that influenza viruses could be easily grown in fertilized hen's eggs. By injecting the virus into the amniotic fluid surrounding the chick embryo, the virus grows in the lungs and is secreted back into the amniotic fluid when the embryo exhales, turning the normally clear fluid cloudy within two days.

Johan Hultin traveled to Brevig Mission, Alaska, and successfully retrieved frozen lung tissue samples from 1918 victims buried in the permafrost.

Egg Culture and Viral Mechanics

Influenza viruses depend on specific surface proteins, hemagglutinin and neuraminidase, to enter and exit host cells. Hemagglutinin causes red blood cells to clump and is used by the virus to hoist itself into a cell, while neuraminidase allows newly made viruses to burst the cell open and escape. In 1941, scientists discovered hemagglutinin because it makes red blood cells agglutinate or clump into a lattice that sinks to form a red button.

Virologist William Hale suggested that the deadly 1918 influenza virus might still be preserved in a state of suspended animation within bodies buried in northern permafrost. During a luncheon at the University of Iowa in 1950, William Hale casually remarked that someone needed to find well-preserved bodies in northern permafrost containing the 1918 flu virus. When Johan Hultin applied for a research grant to fund his Alaska expedition, he discovered the Army had seized his idea for a classified mission. The Army planned its own classified expedition named Project George to find 1918 flu victims in Alaska at a cost of $300,000, prompting Hultin and his university to secure immediate funding to beat them. Roger Porter discovered the Army's plan through a congressman brother-in-law and secured a $10,000 grant from the University of Iowa medical school's central scientific fund for Hultin's mission.

The Brevig Mission Excavation

The initial search for 1918 flu victims in Nome, Alaska, failed because a shifting river had melted the permafrost and destroyed the soft tissue. When Hultin and later the Army mission arrived in Nome, they found that the permafrost was gone due to a nearby river changing its course, leaving only skeletons without soft tissue. The Army's classified mission arrived in Nome ten days after Hultin and confirmed that the bodies were in an advanced state of deterioration with no live virus left.

Johan Hultin successfully located frozen bodies of 1918 flu victims in Brevig Mission, Alaska, by melting the rubbery permafrost with fires. In 1951, Hultin and his colleagues from the University of Iowa dug down six to seven feet in Brevig, recovering lung tissue samples from five bodies, including a young girl in a gray dress with red ribbons. 72 out of 80 people were residents of Brevig who died of the flu in November 1918.

You can follow Hultin's excavation steps to reach frozen ground:

• Build a fire on one side of the hole to warm up and soften the earth.
• Scrape off about two inches of melted ground.
• Build another fire on the other side of the grave and repeat the process.

Johan Hultin attempted to resurrect the 1918 flu virus from frozen lung tissue in an Iowa laboratory, but his efforts resulted in negative findings. Working with technician Sally Whitney, Hultin spent a month and a half injecting hundreds of eggs and testing ferrets before concluding the virus samples were dead. In 1957, scientists discovered interferon, a natural protein secreted by white blood cells that acts as an antiviral defense.

5. The 1976 Swine Flu Affair

A single death at Fort Dix triggered a massive, politically driven U.S. government immunization campaign based on fears of a returning 1918 flu pandemic.

The Fort Dix Outbreak

Eighteen-year-old Private David Lewis fell ill on February 4, 1976, at Fort Dix, participated in a hike against his worsening condition, collapsed, and died a few hours later. Initial assumptions blamed an adenovirus, but lab testing revealed an unknown influenza strain that was later identified via antibody tests as a swine flu virus related to the 1918 pandemic agent. Four men were initially found to be infected, while five hundred recruits evidently caught and resisted the virus.

Virologist Edwin D. Kilbourne argued that influenza pandemics follow a cyclical eleven-year pattern based on limited surface proteins. The New York Times published an op-ed by Kilbourne on the same day the CDC identified the Fort Dix virus, featuring the headline "Flu to the Starboard! Man the Harpoon. Fill 'em with Vaccine! Get the Captain!" Dr. David Sencer called an emergency Saturday meeting in Atlanta on February 14, 1976, beginning at 11 a.m.

Because the original swine flu isolate grew poorly in the laboratory, Kilbourne developed a fast-growing variant called X-53 to enable vaccine manufacturing. Kilbourne and his assistant Barbara Pokorny kept a strict pact of silence, refusing to let anyone into the laboratory while they worked with the virus over a national holiday weekend. Within two weeks, they generated the strain, and four vaccine manufacturers began working with it within a week of its distribution.

Political Escalation and Decision Making

Public health officials recognized that launching a massive immunization program was a political and administrative no-win situation carrying extreme risks of public backlash either way. If an epidemic occurred and the government stored vaccine in warehouses, officials would be blamed for doing nothing. If no epidemic occurred, they would be accused of wasting money and crying wolf.

Dr. Russell Alexander posed a critical question at the March 10 meeting, suggesting caution and advising that it might be better to make the vaccine and hold it until a dangerous pandemic was clearly underway. You can apply this analytical method to high-stakes decisions:

• Ask what information or evidence would make the group change its mind about the need for a specific intervention.
• Determine whether evidence of mild cases, localized outbreaks, or distinct timing would alter the risk assessment.

Dr. David Sencer crafted a nine-page action memorandum that successfully drove the federal chain of command to approve an unprecedented national immunization program costing $100 million for the vaccine and $34 million to run the program. HEW Secretary David Mathews escalated the strong possibility of an outbreak into an absolute certainty of a returning killer virus, telling James T. Lynn that half a million Americans died in 1918 and projecting one million deaths for 1976. President Gerald Ford held a meeting in the Cabinet Room on March 24, 1976, attended by Kilbourne, Stallones, Jonas Salk, and Albert Sabin, where all raised their hands in favor of proceeding. President Ford then asked Congress to appropriate $135 million for producing sufficient vaccine to inoculate every American.

6. A Litigation Nightmare

President Ford's massive swine flu immunization campaign immediately faced fierce internal dissent from political advisors and federal scientists who viewed it as unjustified, premature, and a political ploy. Journalists John Cochran and Robert Pierpoint uncovered that political advisors and CDC scientists privately regarded the campaign as loony and political, verifying a total lack of enthusiasm among Ford's inner circle before public announcements were made.

Vaccine manufacturers halted production because insurance companies refused to provide liability coverage for potential adverse reactions, fearing catastrophic financial losses from lawsuits.

Following precedents like the Reyes v. Wyeth Laboratories polio case where a manufacturer was held liable despite proper warnings, insurance companies realized they faced unlimited liability for coincidental illnesses occurring after mass vaccination. Merrell National and Parke-Davis announced they would stop production and not purchase eggs unless the federal government provided indemnification, leading to an impasse broken only after the Legionnaires' disease scare.

Liability and Public Panic

The sudden deaths of three elderly people in Pittsburgh shortly after receiving swine flu shots sparked widespread media panic, premature coroner conclusions, and temporary suspensions of the campaign. Even though statistical analysis showed that elderly individuals naturally suffer fatal heart events at expected daily rates, the clustering of deaths in the same clinic triggered sensationalized news reporting and plummeting public participation.

Dr. Cyril Wecht, the Allegheny County coroner, publicly stated on CBS television that a bad batch of vaccine was definitely a possibility, leading multiple states to suspend their immunization campaigns.

The Guillain-Barré Crisis

An epidemiological investigation revealed a causal link between the swine flu vaccine and an increased risk of developing the rare paralyzing nerve disorder Guillain-Barré syndrome, forcing the termination of the campaign. CDC epidemiologist Lawrence Schonberger analyzed reports from across the nation and demonstrated an eightfold increase in risk during a ten-week window following vaccination, peaking in the third week, which led to the suspension of the program.

A Minnesota doctor reported a patient developing Guillain-Barré syndrome after vaccination, which initiated a massive surveillance effort culminating in Dr. David Sencer halting the immunization campaign on December 16, 1976.

7. Molecular Biology Breakthroughs

Inspired by John Dalton's preserved eyeballs, Jeffery Taubenberger and Ann Reid used polymerase chain reaction to extract viral gene fragments from old autopsy tissue.

Dr. Jeffery Taubenberger read a Science article describing how scientists used PCR on cells from John Dalton's preserved eyeballs to solve his color blindness. This sparked the idea that the Armed Forces Institute of Pathology repository could answer historical medical mysteries. John Dalton was born in 1766 and discovered his color blindness in 1794. He died at age seventy-eight on July 27, 1844, and his assistant Joseph Ransome preserved his eyes, which modern scientists tested using PCR.

The AFIP Tissue Repository

The Armed Forces Institute of Pathology maintained a massive repository of preserved human tissue samples. The institute accumulated three million specimens stored in cardboard boxes on metal shelves, managed by Al Riddick. Veterinary pathologist Thomas Lipscomb suspected a virus was killing massive numbers of dolphins along the coast. In 1987, bottle-nosed dolphins experienced massive die-offs, killing about ten,000 animals. Molecular biologist Amy Krafft retrieved viral RNA from putrefied dolphin tissue, establishing a technical precedent for the 1918 flu project.

PCR Extraction Procedures

Ann Reid developed a meticulous step-by-step laboratory procedure to extract gene fragments from paraffin-embedded lung tissue. Private Roscoe Vaughan, a twenty-one-year-old soldier at Camp Jackson, reported to sick call on September 19, 1918, and died at 6:30 a.m. on September 26, 1918. Autopsy showed his lungs were filled with fluid and his chest cavity contained about 1.25 cups of clear fluid. You can follow these exact extraction steps:

• Slice off a few exquisitely thin slices from the paraffin block using a sharply honed razor blade.
• Put the slices into a small test tube and add xylene to dissolve the wax.
• Spin test tubes in a centrifuge so cells clump at the bottom and pour out the organic chemical.
• Wash the cells with alcohol to draw out clinging xylene.
• Put the clump of lung tissue into a test tube and add a salt solution, proteinase K to chew up proteins, and a little detergent to dissolve fatty cell membranes.
• Perform an organic extraction by adding chloroform and phenol, shaking the mixture, and separating the oily layer containing proteins and fats from the watery layer containing genes.
• Centrifuge the mixture and remove the watery solution from the top.
• Add alcohol to the solution, place test tubes in a centrifuge, and spin to force gene shards into a tiny pellet at the bottom.
• Pour out the liquid and add salt water to dissolve the pellets, leaving genes ready for analysis.

8. An Incident in Hong Kong

The emergence of the H5N1 avian flu in Hong Kong in 1997 alarmed virologists and prompted a massive government cull of poultry to prevent a global pandemic.

Dr. Nancy Cox at the Centers for Disease Control and Prevention identified the H5N1 strain from throat washings of a three-year-old boy who died of viral pneumonia and Reye's syndrome in Hong Kong in May 1997. Standard antibody tests initially failed because hemagglutinin and neuraminidase were entirely characteristic of bird flus rather than human strains.

A three-year-old boy in Hong Kong who was previously healthy and active fell ill in early May 1997 with viral pneumonia and died while tethered to a respirator, becoming the first documented human case of H5N1 infection.

Discovery of H5N1

Southern China serves as the global epicenter for influenza due to traditional farming practices that keep ducks, pigs, and humans in close proximity. An international team of scientists deployed to Hong Kong to systematically rule out laboratory contamination and trace the origin of the human H5N1 infection.

Wet Markets and Poultry Cull

Wet markets in Hong Kong serving fresh poultry supplied mainly by China were identified as the primary source of the H5N1 virus, prompting a massive government-mandated cull of all local chickens.

Dr. Shortridge and investigators discovered that one out of every five chickens in Hong Kong wet markets was infected with H5N1 after testing fecal samples by injecting them into chicken eggs. Steven Ip announced the destruction of all chickens in Hong Kong, resulting in workers slaughtering 1.2 million chickens across 160 farms and 1,000 stalls within two days in December 1997.

To prevent a catastrophic genetic reassortment, you can follow the steps used during the crisis:

• Pull chickens, ducks, pigeons, and quail out of cages stacked in tall piles.
• Slit each bird's throat using sharp knives and discard carcasses into plastic garbage bins.
• Transport carcasses to be disinfected and buried in landfills.
• Mandate that chickens be kept in plastic cages that can be easily disinfected rather than wooden cages.

9. From Alaska to Norway

Geographer Kirsty Duncan spent years organizing an ethical and scientific expedition to find the 1918 flu virus in the permafrost-buried bodies of Norwegian miners on the remote island of Spitsbergen. Parallel scientific expeditions by Kirsty Duncan in Spitsbergen and Johan Hultin in Alaska demonstrated the challenges of recovering historical viral samples from permafrost.

In May 1996, Duncan visited the lonely gravesite on Spitsbergen containing six white crosses and a headstone marking the graves of seven young Norwegian miners who died of the flu in September 1918. Duncan spent 60,000 dollars of her own money over two years planning the expedition. The total estimated cost of Duncan's Spitsbergen expedition reached 500,000 dollars, mostly funded by grants.

The Spitsbergen Search

To prepare a site safely, you can follow these steps:

• Write to vital statistics and historical institutes to trace archival records of flu victims buried in permafrost.
• Consult local ministers, church councils, and surviving families to secure explicit ethical permission before disturbing a gravesite.
• Employ ground-penetrating radar to determine the location of coffins and the depth of the permafrost active layer.
• Erect perimeter fencing, lay protective blue matting, and utilize winch systems by hand to transport supplies without heavy machinery.
• Construct temporary workspaces including heavy-duty tents, backup generators, and decontamination showers.

The Brevig Discovery

Retired pathologist Johan Hultin executed a swift, low-profile, self-funded expedition to Brevig, Alaska, and successfully retrieved frozen lung tissue from a 1918 flu victim. Hultin paid 900 dollars to his four young Eskimo assistants out of a total cost of 3,200 dollars.

To execute a remote excavation independently, you can follow these steps:

• Contact local village councils and community matriarchs in person rather than by phone to discuss sensitive historical excavations.
• Fund expeditions independently to avoid bureaucratic and legal delays.
• Employ local muscle using pickaxes and spades with the split and shovel technique to dig through permafrost.
• Utilize a temporary permafrost tunnel dug into the grave as a natural refrigerator to keep biological specimens cold.
• Divide and ship tissue samples in separate packages using multiple carriers like Federal Express, UPS, and U.S. Postal Service to prevent total loss.

10. Mysteries and Hypotheses

At the turn of the millennium, researchers confronted major mysteries regarding the 1918 influenza: where it originated and why it preferentially killed young, healthy adults. Popular media blamed events like burning pig manure at Fort Riley, Kansas. Experts dismissed such ideas because fragile flu viruses die outside the body.

Origins and Age Distribution

John Oxford wrote poetry about the frozen miners in Spitsbergen and searched the Royal London Hospital basement archives for clinical pathology specimens from 1918. He utilized postmortem record books written in microscopic handwriting by Dr. H. M. Turnbull during World War I. His student assistants found eight wax-encased lung tissue blocks from patients who died of the flu in 1918, though they lacked viable viral shards.

Kennedy Shortridge hypothesized that influenza pandemics originate as bird flus in Guangdong Province, China, and gradually adapt to humans over decades. Analyzing genetic findings by Taubenberger and Reid, Shortridge argued that the 1918 virus evolved from an avian precursor through prolonged co-circulation, explaining why residents of southern China suffered lower mortality rates.

Immunological Theories and Future Preparedness

The unusual age distribution of 1918 flu deaths, which heavily targeted healthy young adults while sparing the elderly, can be explained by prior exposure to a similar historical virus.

Peter Palese noted that viral diseases are generally more severe in young adults than in children. The drop-off in mortality for people over forty occurred because an earlier, milder virus had provided them with pre-existing immunity. Jeffery Taubenberger and Ann Reid sequenced the hemagglutinin and neuraminidase genes and found normal cleavage sites rather than mutations that would allow the virus to spread outside the lungs or into the brain. Taubenberger published their hemagglutinin gene sequence findings in the Proceedings of the National Academy of Sciences on February 16, 1999.

Peter Palese hypothesized that a super-functional NS1 protein could make the 1918 flu extraordinarily deadly by blocking the body's interferon response. Taubenberger proposed that individuals exposed to the 1890 influenza virus produced abundant antibodies that aggressively attacked the similar surface proteins of the 1918 virus, causing an influx of fluids and white blood cells that destroyed the lungs.

Although the exact murder weapon of the 1918 virus remains elusive, modern medicine possesses antibiotics and vaccines to mitigate future pandemics.

Jeffery Taubenberger emphasized that vigilance and careful surveillance of novel viral reassortments in environments like China remain humanity's primary defense against future outbreaks. You can rely on current medical tools like antibiotics against secondary bacterial pneumonia and sequenced hemagglutinin genes for vaccine production to offer robust defenses.

10 Key Ideas

1. The 1918 influenza epidemic emerged in two distinct waves, killing tens of millions of people globally and overwhelming medical systems that possessed no effective treatments.
2. Extreme plagues reshaped human populations long before 1918, while the catastrophic 1918 outbreak became America's forgotten pandemic despite its unprecedented mortality.
3. Richard Shope discovered that swine influenza emerged in pigs simultaneously with the 1918 human pandemic and required both a virus and a bacterium to cause severe disease, a relationship confirmed by antibody analysis of human survivors.
4. Johan Hultin traveled to Brevig Mission, Alaska, and successfully retrieved frozen lung tissue samples from 1918 victims buried in the permafrost.
5. A single death at Fort Dix triggered a massive, politically driven U.S. government immunization campaign based on fears of a returning 1918 flu pandemic.
6. Vaccine manufacturers halted production because insurance companies refused to provide liability coverage for potential adverse reactions, culminating in a Guillain-Barré crisis that forced the campaign's termination.
7. Inspired by John Dalton's preserved eyeballs, Jeffery Taubenberger and Ann Reid used polymerase chain reaction to extract viral gene fragments from old autopsy tissue.
8. The emergence of the H5N1 avian flu in Hong Kong in 1997 alarmed virologists and prompted a massive government cull of poultry in wet markets to prevent a global pandemic.
9. Parallel scientific expeditions by Kirsty Duncan in Spitsbergen and Johan Hultin in Alaska demonstrated the monumental challenges of recovering historical viral samples from frozen environments.
10. The unusual age distribution of 1918 flu deaths, which heavily targeted healthy young adults while sparing the elderly, can be explained by prior exposure to a similar historical virus, leaving modern medicine better equipped with antibiotics and vaccines to mitigate future outbreaks.