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16 min
global healthagricultureanimal diseasefood securityafrica
Thirty Years of the Wrong Answer
Treinta años matando pollos
South Africa has just become the first African country to approve vaccines for bird flu in poultry, breaking with decades of international policy that demanded infected flocks be culled. Fletcher and Octavio dig into the history of a virus that has been quietly reshaping global farming for thirty years, and debate whether this policy shift has come too late to matter.
Sudáfrica acaba de convertirse en el primer país africano en aprobar vacunas contra la gripe aviar en aves de corral, rompiendo con décadas de política internacional que exigía matar a los animales infectados. Fletcher y Octavio se adentran en la historia de un virus que lleva treinta años reorganizando la ganadería mundial, y debaten si este cambio de rumbo llegará a tiempo para salvar algo.
5 essential C1-level terms from this episode, with translations and example sentences in Spanish.
| Spanish | English | Example |
|---|---|---|
| sacrificio sanitario | sanitary culling; the mass killing of animals to prevent disease spread | El gobierno ordenó el sacrificio sanitario de miles de aves para contener el brote de gripe aviar. |
| reservorio | reservoir (biological/epidemiological); organism or environment where a pathogen lives and can spread | Los murciélagos actúan como reservorios de muchos virus que luego pueden saltar a los humanos. |
| cepa | strain (of a virus or bacteria) | La nueva cepa del virus mostró mayor resistencia a los tratamientos existentes. |
| influenza aviar | avian influenza; bird flu | La influenza aviar ha devastado granjas avícolas en más de veinte países en los últimos dos años. |
| tasa de mortalidad | mortality rate; the proportion of deaths within a population affected by a disease | La tasa de mortalidad del H5N1 en humanos supera ampliamente la de cualquier gripe estacional conocida. |
For thirty years, the standard answer to bird flu was always the same: kill the birds.
Every last one.
And this week, South Africa decided that answer isn't good enough anymore.
Exactamente.
Exactly.
El ministro de Agricultura, John Steenhuisen, anunció la aprobación de vacunas contra la influenza aviar para las aves de corral.
Agriculture Minister John Steenhuisen announced the approval of avian flu vaccines for poultry.
Es una decisión que parece técnica, casi burocrática, pero que en realidad rompe con una política que llevan décadas defendiendo organizaciones como la FAO y la Organización Mundial de Sanidad Animal.
It sounds like a technical, almost bureaucratic decision, but it actually breaks with a policy that organizations like the FAO and the World Organisation for Animal Health have been defending for decades.
And worth saying upfront: this isn't a human vaccine.
We're talking about vaccinating chickens, ducks, turkeys.
The industrial food supply.
Which makes it sound less dramatic than it is.
Claro, pero esa distinción se va desdibujando cuando entiendes la magnitud de lo que está en juego.
Sure, but that distinction blurs once you understand the scale of what's at stake.
En los últimos dos años, la gripe aviar ha destruido más de 300 millones de aves en todo el mundo.
In the past two years, bird flu has wiped out more than 300 million birds worldwide.
Granjas enteras.
Entire farms.
Medios de vida enteros.
Entire livelihoods.
Y en África, donde la avicultura familiar es una red de seguridad económica para millones de personas, eso no es solo una estadística.
And in Africa, where backyard poultry farming is an economic safety net for millions of people, that's not just a statistic.
I want to go back to this 'kill everything' policy, because I think listeners need to understand why it became the orthodoxy in the first place.
It wasn't arbitrary.
No, para nada.
No, not at all.
El método se llama 'stamping out', que en español se suele traducir como 'sacrificio sanitario' o 'control por sacrificio'.
The method is called 'stamping out,' which in Spanish is usually translated as 'sanitary culling' or 'culling for control.' The logic is simple: if you kill the host, you kill the virus.
La lógica es simple: si matas al huésped, matas al virus.
And for decades it worked reasonably well for localized, contained outbreaks.
Y durante décadas funcionó razonablemente bien para brotes locales y contenidos.
The problem being that H5N1 stopped being local and contained a long time ago.
Precisamente.
Precisely.
El H5N1 que conocemos hoy en día no es el mismo virus de los años noventa.
The H5N1 we know today is not the same virus from the nineties.
Ha mutado, se ha dispersado a través de aves migratorias por todos los continentes, y ha dado el salto a mamíferos de una manera que antes se consideraba muy improbable.
It has mutated, spread through migratory birds across every continent, and has jumped to mammals in a way that was previously considered very unlikely.
Vacas lecheras en Estados Unidos, zorros en Europa, leones marinos en Sudamérica.
Dairy cattle in the United States, foxes in Europe, sea lions in South America.
El virus no se está quedando quieto.
The virus is not staying put.
I remember when the cattle cases in the U.S.
first broke, there was this moment of genuine scientific alarm.
Not just farmers, but virologists.
Because dairy herds are enormous, they move between states, and the surveillance infrastructure in American agriculture is, let's say, optimistically described.
Y lo que hace más preocupante todo esto es que el H5N1 tiene una tasa de mortalidad en humanos que ronda el treinta por ciento entre los casos confirmados.
And what makes all of this more worrying is that H5N1 has a mortality rate in humans hovering around thirty percent among confirmed cases.
No se transmite fácilmente de persona a persona todavía, ese 'todavía' es la palabra que quita el sueño a los epidemiólogos.
It doesn't spread easily from person to person yet, and that 'yet' is the word that keeps epidemiologists up at night.
Pero cuanto más se replica en mamíferos, más oportunidades tiene de adquirir esa capacidad.
But the more it replicates in mammals, the more opportunities it has to acquire that ability.
Thirty percent.
To put that in context: seasonal flu is below one percent.
Covid at its worst was somewhere between one and two.
Thirty percent is not a number you want anywhere near a pandemic trajectory.
Dicho esto, hay que ser cuidadosos con esa cifra.
That said, we have to be careful with that figure.
Los casos confirmados en humanos son casi siempre personas con una exposición muy directa a aves infectadas, lo que sesga los datos hacia los casos más graves.
Confirmed human cases are almost always people with very direct exposure to infected birds, which skews the data toward the most severe cases.
Pero sí, el potencial es suficiente para que la comunidad científica lleve años diciendo que necesitamos herramientas adicionales además del sacrificio masivo.
But yes, the potential is enough that the scientific community has been saying for years that we need additional tools beyond mass culling.
So why has the vaccine option taken so long to move forward?
Because it's not like the technology didn't exist.
Aquí es donde se pone interesante.
This is where it gets interesting.
El argumento principal en contra de vacunar a las aves de corral no es científico, es económico y político.
The main argument against vaccinating poultry is not scientific, it's economic and political.
Si vacunas a tus animales, ya no puedes demostrar fácilmente que una granja está libre de virus activo, porque los anticuerpos de la vacuna se confunden con los anticuerpos de la infección real en los análisis estándar.
If you vaccinate your animals, you can no longer easily prove that a farm is free of active virus, because vaccine antibodies are confused with antibodies from actual infection in standard tests.
Ah, I didn't know that.
So you could have vaccinated birds that are carrying the virus and still testing ambiguous.
Exacto.
Exactly.
Y eso importa enormemente en el comercio internacional.
And that matters enormously in international trade.
Países que exportan carne de ave o huevos, como Francia, como Alemania, históricamente han resistido la vacunación porque sus socios comerciales, sobre todo en Asia, simplemente cierran las puertas si sospechan que el producto viene de una región que vacuna.
Countries that export poultry meat or eggs, like France, like Germany, have historically resisted vaccination because their trading partners, especially in Asia, simply close the door if they suspect the product comes from a region that vaccinates.
El miedo a la máscara epidemiológica ha prevalecido sobre el miedo al virus en sí.
The fear of epidemiological masking has prevailed over the fear of the virus itself.
Which is a remarkable inversion of priorities when you spell it out like that.
We'd rather keep culling hundreds of millions of animals than risk losing export markets.
Así funciona el mundo, Fletcher.
That's how the world works, Fletcher.
Pero hay un matiz importante: la tecnología ha cambiado.
But there's an important nuance: the technology has changed.
Ahora existen las llamadas vacunas DIVA, que significa 'Differentiating Infected from Vaccinated Animals'.
Now there are so-called DIVA vaccines, which stands for 'Differentiating Infected from Vaccinated Animals.' Specific tests can distinguish whether an animal has antibodies from the vaccine or from actual infection.
Permiten distinguir mediante pruebas específicas si un animal tiene anticuerpos por la vacuna o por la infección real.
The technical obstacle is no longer insurmountable.
El obstáculo técnico ya no es insalvable.
And France actually started vaccinating ducks a couple of years ago, didn't they?
Which I remember because it was treated as this slightly radical departure.
Sí, Francia comenzó a vacunar patos, que son un reservorio especialmente problemático porque pueden portar el virus sin mostrar síntomas graves y contagiar a otras especies.
Yes, France started vaccinating ducks, which are a particularly problematic reservoir because they can carry the virus without showing severe symptoms and spread it to other species.
Los resultados fueron bastante positivos en términos de reducir los brotes.
The results were quite positive in terms of reducing outbreaks.
No perfectos, pero suficientes para que el argumento teórico contra la vacunación empiece a derrumbarse.
Not perfect, but enough for the theoretical argument against vaccination to start crumbling.
Now, South Africa.
Why does South Africa matter specifically, beyond being the first African country to do this?
Sudáfrica importa por varias razones.
South Africa matters for several reasons.
Primera: es la mayor economía del continente y tiene una industria avícola formal importante, lo que significa que la decisión tiene peso real en el mercado regional.
First: it's the largest economy on the continent and has a significant formal poultry industry, meaning the decision carries real weight in the regional market.
Segunda: el continente africano tiene una densidad enorme de aves de corral criadas en pequeña escala, en patios, en mercados vivos, en condiciones donde el sacrificio masivo es, en la práctica, imposible de ejecutar.
Second: the African continent has an enormous density of small-scale poultry, raised in backyards, in live markets, in conditions where mass culling is, in practice, impossible to carry out.
That's the part that strikes me as most consequential.
You can't 'stamp out' a disease in a subsistence farming context the same way you can at an industrial farm in Iowa.
Completamente.
Completely.
Y hay algo más: en muchas comunidades rurales africanas, perder las aves no es solo un problema económico.
And there's something else: in many rural African communities, losing your birds isn't just an economic problem.
Es un problema nutricional inmediato.
It's an immediate nutritional problem.
Los huevos, el pollo.
The eggs, the chicken.
No hay un seguro agrario, no hay una indemnización del gobierno que llegue en dos semanas.
There's no crop insurance, no government compensation arriving in two weeks.
La familia simplemente pierde esa fuente de proteína.
The family simply loses that source of protein.
Por eso el modelo europeo de sacrificio con compensación económica no se puede exportar tal cual.
That's why the European model of culling with economic compensation can't be exported as-is.
I spent some time in West Africa in the early 2000s during the first big H5N5 scares, and I remember watching Nigerian government officials come to villages with this very clinical approach to culling, and the communities just hid their birds.
Which, of course, made things significantly worse.
Claro, y eso ilustra perfectamente el fallo central del 'stamping out' en contextos de baja confianza institucional.
Exactly, and that perfectly illustrates the central failure of stamping out in contexts of low institutional trust.
La política requiere cooperación voluntaria, y la cooperación voluntaria requiere que la gente sienta que el sistema les protege en lugar de simplemente confiscarles los medios de vida.
The policy requires voluntary cooperation, and voluntary cooperation requires people to feel the system protects them rather than simply confiscating their livelihoods.
Esa confianza no se puede dar por sentada.
That trust cannot be taken for granted.
Let's talk about what South Africa actually approved, because I want to be precise.
This isn't a blanket approval of any bird flu vaccine.
They approved specific products for specific conditions, right?
Sí, aunque los detalles técnicos exactos de cuáles cepas vacunales se aprueban aún están siendo formalizados.
Yes, though the exact technical details of which vaccine strains are being approved are still being formalized.
Lo que es claro es que la decisión implica abandonar el método de 'sacrificio total' como respuesta única y aceptar la vacunación como herramienta complementaria.
What is clear is that the decision means abandoning total culling as the only response and accepting vaccination as a complementary tool.
Y eso, en el lenguaje de la política veterinaria internacional, es un giro importante.
And in the language of international veterinary policy, that is a significant shift.
The thing I keep turning over is whether this actually signals a broader shift, or whether it's South Africa doing what South Africa occasionally does, which is making a bold call while the rest of the continent watches.
Es una pregunta justa.
That's a fair question.
Pero hay algo en el contexto global que hace pensar que esta vez el movimiento podría tener más inercia.
But there's something in the global context that suggests this time the move might have more momentum.
La Unión Europea ha cambiado su postura, aunque de forma muy cautelosa.
The European Union has shifted its stance, cautiously.
Estados Unidos está debatiendo activamente la vacunación de aves de corral después de los brotes en vacas lecheras.
The United States is actively debating poultry vaccination after the dairy cattle outbreaks.
Y la OIE, la organización internacional de sanidad animal, ha suavizado considerablemente su lenguaje al respecto.
And the OIE, the international animal health organization, has considerably softened its language on the matter.
There's also the egg price angle, which feels crass to bring up but is real.
In parts of the U.S.
last year, egg prices tripled.
I was reading a piece about a family in Ohio who started keeping backyard chickens partly because supermarket eggs had become genuinely expensive.
No es craso en absoluto, es exactamente el punto.
Not crass at all, that's exactly the point.
Cuando destruyes cientos de millones de gallinas ponedoras, la oferta cae y los precios suben.
When you destroy hundreds of millions of laying hens, supply falls and prices rise.
En países ricos eso es un dolor de cabeza;
In wealthy countries that's a headache;
en países más pobres puede ser una crisis de acceso a proteínas.
in poorer countries it can be a protein access crisis.
El coste económico de la política de sacrificio masivo nunca ha sido suficientemente transparente en el debate público.
The economic cost of the mass culling policy has never been sufficiently transparent in public debate.
There's a historian's argument to be made here about how we've dealt with animal disease over the centuries.
Foot and mouth in the UK in 2001.
The BSE crisis.
There's this recurring pattern of catastrophic culling events that traumatize farming communities and then get quietly forgotten until the next one.
La fiebre aftosa del 2001 en el Reino Unido.
Foot and mouth 2001 in the UK.
Seis millones de animales sacrificados.
Six million animals culled.
Las imágenes de las piras de cadáveres ardiendo en los campos.
The images of carcass pyres burning in the fields.
Políticamente fue devastador para el gobierno de Blair.
Politically it was devastating for Blair's government.
Y lo curioso es que el Reino Unido vacuna contra la fiebre aftosa en otros países a través de su ayuda veterinaria internacional, pero se resistió a vacunar en casa durante décadas por los mismos argumentos de acceso al mercado que estamos discutiendo ahora.
And the curious thing is that the UK vaccinates against foot and mouth in other countries through its international veterinary aid, but resisted vaccinating at home for decades for the same market access arguments we're discussing now.
I hadn't connected those two things.
That's a genuinely uncomfortable parallel.
La política sanitaria animal lleva décadas siendo rehén de las reglas del comercio internacional.
Animal health policy has for decades been held hostage to the rules of international trade.
Y lo que está haciendo Sudáfrica, en cierta medida, es decir: nosotros tenemos un contexto diferente, tenemos unas necesidades diferentes, y no vamos a subordinar la protección de nuestra seguridad alimentaria a unos acuerdos de exportación que en realidad benefician sobre todo a otros.
And what South Africa is doing, to some extent, is saying: we have a different context, we have different needs, and we are not going to subordinate the protection of our food security to export agreements that actually benefit others most.
Which connects to a broader post-pandemic conversation about whether global health governance is actually designed for the world as it is, or for the world as wealthy countries need it to be.
Exactamente, y ese debate tiene consecuencias muy directas.
Exactly, and that debate has very direct consequences.
Si el H5N1 da el salto a la transmisión sostenida entre humanos, los países que hayan construido resiliencia en su sistema ganadero mediante la vacunación estarán en una posición mucho mejor, tanto para proteger la cadena alimentaria como para reducir las oportunidades de que el virus evolucione en reservorios animales cercanos a los humanos.
If H5N1 achieves sustained human-to-human transmission, countries that have built resilience in their livestock systems through vaccination will be in a much better position, both to protect the food chain and to reduce the opportunities for the virus to evolve in animal reservoirs close to humans.
The other thing worth naming is that we're having this conversation while the world is already dealing with the Iran war, Ebola in the Congo, conflict all over the place.
International health attention is not exactly plentiful right now.
Y esa competencia por la atención y por los recursos es uno de los grandes problemas no resueltos de la salud global.
And that competition for attention and for resources is one of the great unsolved problems of global health.
Las pandemias no esperan a que terminemos con la anterior emergencia.
Pandemics don't wait until we're done with the previous emergency.
El H5N1 ha estado avanzando calladamente mientras todos mirábamos para otro lado, y este movimiento de Sudáfrica es, en el fondo, un reconocimiento de que hay que actuar aunque nadie esté prestando atención.
H5N1 has been advancing quietly while everyone was looking the other way, and South Africa's move is, at its core, an acknowledgment that action is necessary even when nobody is paying attention.
My instinct is that the story of bird flu vaccines in Africa will be remembered either as the moment a continent got ahead of a crisis, or as the moment one country did the right thing and the structures around it made it nearly impossible to follow.
I genuinely don't know which.
Yo tampoco, y eso es honestamente la respuesta más sincera que podemos dar.
Neither do I, and that is honestly the most sincere answer we can give.
Lo que sí sé es que la política de sacrificio masivo, que durante décadas se presentó como la única opción responsable, nunca fue tan inevitable como se hacía ver.
What I do know is that the mass culling policy, which for decades was presented as the only responsible option, was never as inevitable as it was made to seem.
Era una elección.
It was a choice.
Y otras elecciones son posibles.
And other choices are possible.
Oye, can I ask you something about how you said 'reservorios' earlier?
Because you used it in a very specific way and I want to make sure I understood correctly.
Sí, claro.
Yes, of course.
'Reservorio' en biología y epidemiología tiene un significado muy preciso: es el organismo o el ambiente donde un agente infeccioso vive y se multiplica, y desde el cual puede infectar a otros.
'Reservorio' in biology and epidemiology has a very precise meaning: it's the organism or environment where an infectious agent lives and multiplies, and from which it can infect others.
Los patos son reservorios del H5N1 porque lo portan sin morir necesariamente de él.
Ducks are reservoirs of H5N1 because they carry it without necessarily dying from it.
So it's a false cognate with the English 'reservoir' only in the sense that in English we mostly use it for water.
In Spanish it does the same water meaning but also this biological one?
En español 'reservorio' es casi exclusivamente técnico, sobre todo en contextos médicos y ecológicos.
In Spanish 'reservorio' is almost exclusively technical, especially in medical and ecological contexts.
Para el agua usamos 'embalse' o 'depósito'.
For water we use 'embalse' or 'depósito.' If you say 'reservorio de agua' in Spanish it sounds odd, overly formal.
Si dices 'reservorio de agua' en español, suena raro, demasiado formal.
But 'reservorio de virus,' 'reservorio animal,' that is completely natural in a scientific text or a conversation like this one.
Pero 'reservorio de virus', 'reservorio animal', eso sí es completamente natural en un texto científico o en una conversación como esta.
So I could confidently use 'reservorio' in a medical context but if I asked someone where to fill my water bottle using that word I'd sound like a research paper.
Sonarías como alguien que ha aprendido español estudiando virología, lo cual, pensándolo bien, encaja perfectamente contigo.
You would sound like someone who learned Spanish by studying virology, which, thinking about it, suits you perfectly.
Aunque prefiero eso a lo de 'muy embarazado'.
Although I prefer that to the 'muy embarazado' business.
We are never, ever getting past that.
Gracias, Octavio.
This one felt important.