Vectors 7: The Next One

VECTORS: HOW HEALTH MISINFORMATION KILLS

Piece 7: The Next One

A wildlife veterinarian in Liberia was driving to a field site when his phone rang. The voice on the other end told him to turn around. Not because the outbreak had been contained. Because the money was gone. The USAID-funded STOP Spillover project — a consortium monitoring avian influenza, Lassa virus, and other pathogens across seven countries — had just received a termination email from Washington. The Liberia team was left with a freezer full of blood samples from consenting research participants, halfway tested, results undeliverable.^[1] The car turned around. The viruses did not.

That moment in late January 2025 is a useful image for where we are. Six pieces of this series have documented the people and mechanisms that made the COVID-19 pandemic deadlier than it needed to be: the credentialed fabricators, the political weaponizers, the institutional deflectors, the legal predators, the individual dismantlers, and the body count they left behind. This final piece looks forward. The question is not whether another pandemic is coming. The question is whether we will be able to see it before it sees us — and whether the misinformation that crippled our response to the last one is now actively dismantling our capacity to respond to the next.

The Biology Has Not Changed

Every pandemic in recorded history that spread widely through human populations began as a zoonotic event — a pathogen crossing the species barrier from an animal reservoir into humans.^[2] The mechanism is not exotic. It is biology doing what biology does: viruses replicate, mutate, and occasionally find a new host that suits them. What varies is the rate of opportunity, and the rate of opportunity is accelerating.

Deforestation drives humans and wildlife into contact zones that did not previously exist. Agricultural intensification crowds animal species — including known viral reservoirs — into proximity with each other and with human workers. Climate change forces animal populations into new ranges, creating novel species encounters and, with them, novel opportunities for pathogens to find intermediate hosts.^[3] Live animal markets, wet and dry, remain operational across the regions of the world where the density of viral diversity in wildlife is highest. The math is not complicated. More contact means more spillover attempts. More spillover attempts means more chances for one to succeed in establishing human-to-human transmission.

Scientists had been watching this particular arithmetic long before COVID-19. In 2013, virologist Linfa Wang predicted that another coronavirus pandemic would occur within a decade. He was right. The bat coronaviruses — sarbecoviruses — had been identified as posing a clear and present danger of pandemic overspill for years before SARS-CoV-2 made the crossing.^[4] After SARS-CoV-1 in 2002, attention briefly intensified, then dissipated. After MERS, the same. The pattern is familiar: a near miss, a flurry of concern, then neglect until the next event. What COVID-19 added to the pattern was scale.

H5N1 Is Already Here

The argument that zoonotic risk is hypothetical or distant did not survive the spring of 2024.

In late January of that year, veterinarians observed dairy cattle in the United States displaying decreased feed intake and dramatic drops in milk production. Genome sequencing confirmed what no one expected: Highly Pathogenic Avian Influenza H5N1, a virus previously considered an avian pathogen with limited capacity to infect mammals, had achieved something unprecedented — sustained transmission within a population of cattle, an entirely new mammalian host.^[5] By June 2025, H5N1 clade 2.3.4.4b had been detected in approximately 13,225 wild birds, 175 million poultry, and 1,075 dairy herds across 17 states.^[6]

The virus demonstrated tropism for mammary tissue, with high viral loads in milk. Genomic analysis found mutations enhancing binding to mammalian receptors. Forty-one human infections linked to dairy operations were confirmed.^[7] A Louisiana farmworker died. In British Columbia, a case involving the newer D1.1 genotype produced severe illness in a teenager with no identified animal exposure.^[8] Pigs — which are susceptible to both avian and human influenza strains and serve as classical "mixing vessels" where reassortment can occur — have not yet been infected at scale, but researchers flag this as a critical concern.^[9]

The case fatality rate of H5N1 in humans — roughly 52 percent since 2003 — is not a figure that lends itself to calm. COVID-19, with a fatality rate orders of magnitude lower, killed millions and unmade economies. H5N1 has not yet acquired efficient human-to-human transmission. That acquisition is the threshold. The virus is in the barn. It is mutating. Whether it crosses that threshold is a question of evolutionary probability playing out in real time across a surveillance system that is currently being systematically defunded.

The Surveillance System Is Failing

The United States' capacity to detect and respond to emerging infectious disease threats depends on an architecture built over decades: CDC field epidemiologists tracking outbreaks globally, USAID-funded surveillance networks in the regions of highest spillover risk, NIH-funded research on pathogen behavior, and WHO as the international coordinating layer that aggregates signal from 194 member states. In 2025, each element of that architecture is under deliberate assault.

On his first day in office, President Trump signed an executive order withdrawing the United States from the WHO and ordering an immediate halt to all contacts between U.S. government agencies — including the CDC — and WHO staff.^[10] USAID, which had employed approximately 50 staff specifically supporting international outbreak response, was effectively dissolved; that number dropped to six in the first weeks of the administration.^[11] The $11.4 billion in CDC grants to state and local health departments — including funding explicitly targeted for wastewater surveillance, disease-tracking technology, and H5N1 response — were cancelled.^[12] NIH grant terminations exceeded $1.8 billion, with infectious disease research among the hardest hit.^[13]

The STOP Spillover project is an emblem of what was lost, not an outlier. A $100 million USAID-funded consortium tracking avian influenza, Lassa virus, Ebola, Marburg, and other high-consequence pathogens across Bangladesh, Cambodia, Liberia, Sierra Leone, Uganda, Vietnam, and Indonesia — ended with a single email.^[14] Lassa samples in Liberia sit untested in a freezer. Colleagues monitoring bird flu in southeast Asia were told to book flights home.

What the Misinformation Did

This piece is part of a series about how misinformation kills. The connection to pandemic preparedness requires precision, because the causal chain is indirect but traceable.

The lab leak hypothesis — promoted most aggressively by figures documented in earlier pieces of this series — did not merely generate false belief about the origins of SARS-CoV-2. It reshaped the political conditions under which pandemic preparedness policy is now being made. The Trump administration's executive order halting federal support for gain-of-function research was explicitly premised on the contested lab leak theory, despite the weight of peer-reviewed virology consolidating around natural zoonotic emergence.^[15] The same apparatus of accusation that targeted Fauci, Daszak, and the virologists who published Proximal Origin was used to justify defunding the very surveillance programs designed to catch the next spillover before it becomes a pandemic.

When the scientific community is accused of fabricating zoonotic origin evidence to protect China, and when those accusations are repeated by congressional committees and amplified by credentialed contrarians, the political consequence is predictable: public health institutions lose legitimacy, surveillance funding becomes a political target, and the withdrawal from WHO becomes a policy option rather than an obvious act of self-harm.

The CNN analysis by Andersen, Garry, and Holmes — three of the virologists behind Proximal Origin — stated the matter plainly: the false balance imposed on the origins question has stoked an anti-science agenda that is now being used to justify deep cuts to biomedical research, public health, and global aid.^[16] The cuts are not a coincidence. They are downstream of the misinformation.

What Preparedness Actually Requires

The science of pandemic prevention has converged on a framework called One Health — the recognition that human health, animal health, and environmental health are inseparable, and that effective pandemic prevention requires surveillance and intervention across all three domains simultaneously.^[17] The interventions that matter most happen before human infection: monitoring wildlife and livestock populations for novel pathogens, reducing the ecological disruption that creates spillover conditions, and building laboratory and epidemiological capacity in the regions where spillover risk is highest.

A landmark Science Advances analysis found that primary pandemic prevention — the surveillance and environmental management that prevents spillover from occurring — costs less than one-twentieth the annual value of lives lost to emerging zoonoses.^[18] This is not an argument against post-spillover response capacity. It is an argument for spending a fraction of the response budget upstream, at the point where the virus is still in the bat, the mink, the civet cat — before it finds its way into a dairy farm in Texas.

The CEPI-WHO Global Pandemic Preparedness Summit, held in Rio de Janeiro in 2024, moved in this direction, proposing a framework that would expand research across entire pathogen families — not just known pandemic threats — to illuminate the virological dark.^[19] The analogy offered was apt: scientists searching for pandemic pathogens are like people looking for lost keys under a streetlight. Prototype pathogen research expands the lit area. What the current U.S. administration has done is pull the streetlight out of the ground.

The Warning That Is Still Actionable

The series began with a framework. Piece 1 identified three tiers of actors in the misinformation ecosystem: fabricators who originate false claims, weaponizers who deploy them for political gain, and deflectors who misdirect scrutiny in ways that serve the same ends. What the H5N1 situation and the dismantling of pandemic surveillance infrastructure make clear is that the ecosystem's effects are not merely epistemic. They are structural. The misinformation did not just change what people believed about COVID-19. It changed what is politically possible in the aftermath.

But the ending is not written. The biology is indifferent to politics; a virus does not wait for a surveillance program to be restored before it mutates. But humans are not indifferent, and humans build the institutions. Several things remain true that were also true before January 2025:

Zoonotic spillover surveillance can be rebuilt. The STOP Spillover consortium, the USAID global health security programs, the CDC's international outbreak-response capacity — these were built because people decided to build them. They can be rebuilt by successor administrations, by allied governments, by the coalition of nations that joined the WHO Pandemic Agreement in 2025 without U.S. participation.^[20] The architecture is known. The science is not in dispute.

H5N1 has not yet made the critical acquisition. As of the time of writing, H5N1 has not achieved efficient human-to-human transmission. The window has not closed. A functional surveillance system — one capable of detecting that transition early — compresses the response window from months to days. The difference between early detection and late detection of a pandemic pathogen is measured in millions of lives.

Public accountability is a tool. The voters who reelected leaders who defunded pandemic preparedness did not, for the most part, understand that this was what they were doing. The connection between the lab leak misinformation campaign and the evisceration of USAID's disease surveillance programs is not self-evident to most people. Making it evident is what journalism, and series like this one, exist to do.

This is the final piece in the Vectors series. Preceding pieces: "The Ecosystem" (Piece 1), "The Radicalization Pipeline" (Piece 2), "The Prestige Problem" (Piece 3), "The Contaminated Substrate" (Piece 4), "The Dismantler" (Piece 5), and "The Body Count" (Piece 6).