A measles outbreak in Bangladesh leaves at least six dead and more than 1,500 cases in a single day, a reminder that vaccine-preventable diseases are still killing people. Fletcher and Octavio dig into the history of measles eradication, the devastating toll COVID took on vaccination programs, and what this outbreak reveals about global health inequality.
Un brote de sarampión en Bangladesh deja al menos seis muertos y más de 1.500 casos en un solo día, recordándonos que las enfermedades prevenibles con vacunas siguen matando. Fletcher y Octavio indagan en la historia de la erradicación del sarampión, el papel devastador del COVID en los programas de vacunación y lo que este brote revela sobre la desigualdad sanitaria global.
7 essential C1-level terms from this episode, with translations and example sentences in Spanish.
| Spanish | English | Example |
|---|---|---|
| inmuno-amnesia | immune amnesia | La inmuno-amnesia causada por el sarampión puede dejar a los niños vulnerables a enfermedades contra las que ya habían desarrollado defensas. |
| cobertura vacunal | vaccination coverage | Si la cobertura vacunal cae por debajo del noventa y cinco por ciento, el sarampión puede propagarse rápidamente en la comunidad. |
| hesitación vacunal | vaccine hesitancy | La hesitación vacunal en Europa tiene causas muy distintas a la falta de acceso a las vacunas en los países de renta baja. |
| umbral de inmunidad de rebaño | herd immunity threshold | Para el sarampión, el umbral de inmunidad de rebaño es de aproximadamente el noventa y cinco por ciento de la población vacunada. |
| aunque sea | even if only / even a little (hypothetical concession with subjunctive) | Si la cobertura cae aunque sea un poco, el virus encuentra sus huecos y los aprovecha. |
| brecha acumulada | accumulated gap | La brecha acumulada de niños sin vacunar durante la pandemia explica la magnitud del brote actual. |
| panencefalitis esclerosante subaguda | subacute sclerosing panencephalitis | La panencefalitis esclerosante subaguda es una complicación fatal del sarampión que puede aparecer años después de la infección inicial. |
Measles killed more children under five than any other vaccine-preventable disease in recorded history, and yesterday Bangladesh reported roughly 1,517 new cases in a single day.
I want to sit with that number for a second.
Y lo que hace que ese número sea tan inquietante, Fletcher, no es solo la cifra en sí, sino lo que representa: el sarampión es una enfermedad que ya sabemos cómo prevenir.
And what makes that number so unsettling, Fletcher, isn't just the figure itself, but what it represents: measles is a disease we already know how to prevent.
Tenemos la vacuna desde 1963.
We've had the vaccine since 1963.
No estamos hablando de algo nuevo ni misterioso.
We're not talking about something new or mysterious.
Which is what gets me.
Six deaths reported in the last twenty-four hours on top of those 1,500-plus cases.
And measles isn't supposed to be a killer anymore, not in the twenty-first century.
That's the whole point.
Exacto.
Exactly.
Y para entender por qué esto importa tanto, hay que recordar lo que conseguimos, o lo que creímos haber conseguido.
And to understand why this matters so much, you have to remember what we achieved, or what we thought we had achieved.
En 2000, la Organización Mundial de la Salud lanzó la Iniciativa contra el Sarampión con una meta clara: reducir las muertes en un noventa por ciento en menos de una década.
In 2000, the World Health Organization launched the Measles Initiative with a clear goal: to reduce deaths by ninety percent in less than a decade.
Y lo lograron.
And they did it.
Pasamos de más de quinientas mil muertes anuales a menos de cien mil.
We went from more than five hundred thousand annual deaths to fewer than a hundred thousand.
Fue uno de los mayores éxitos de la salud pública en la historia moderna.
It was one of the greatest public health successes in modern history.
I covered the tail end of that era.
There was this real sense of momentum, like eradication was actually within reach.
People were comparing it to smallpox, which we genuinely did eradicate in 1980.
The word 'eradication' was being used seriously, not aspirationally.
Pero el sarampión no es la viruela, y esa distinción importa muchísimo.
But measles is not smallpox, and that distinction matters enormously.
La viruela solo infectaba a humanos, no tenía reservorio animal.
Smallpox only infected humans, it had no animal reservoir.
El sarampión tampoco tiene reservorio animal, lo cual técnicamente lo hace candidato a la erradicación, pero tiene algo que lo hace mucho más difícil de controlar: es el patógeno más contagioso que conocemos.
Measles also has no animal reservoir, which technically makes it a candidate for eradication, but it has something that makes it much harder to control: it is the most contagious pathogen we know.
Su número reproductivo básico, el famoso R0, está entre doce y dieciocho.
Its basic reproduction number, the famous R0, is between twelve and eighteen.
Para que te hagas una idea, el COVID original rondaba el dos o el tres.
To give you an idea, the original COVID was around two or three.
Twelve to eighteen.
That means one person with measles infects, on average, between twelve and eighteen unvaccinated people around them.
That's a staggering number when you say it out loud.
Y eso tiene una consecuencia directa sobre la cobertura vacunal que necesitas para proteger a una comunidad.
And that has a direct consequence for the vaccination coverage you need to protect a community.
Con el COVID, una cobertura del sesenta o setenta por ciento podía bastar para frenar la transmisión.
With COVID, coverage of sixty or seventy percent could be enough to slow transmission.
Con el sarampión necesitas que el noventa y cinco por ciento de la población esté vacunada.
With measles you need ninety-five percent of the population to be vaccinated.
El noventa y cinco.
Ninety-five.
Si baja aunque sea un poco, el virus encuentra sus huecos y los aprovecha.
If it drops even a little, the virus finds its gaps and exploits them.
So the margin for error is almost nonexistent.
Now, Bangladesh, where does it stand on that threshold?
Because 1,500 cases in a day suggests they're well below ninety-five percent.
Bangladesh tiene una cobertura vacunal que en los años previos a la pandemia rondaba el ochenta y tres, ochenta y cinco por ciento, que ya estaba por debajo del umbral necesario para el sarampión.
Bangladesh had vaccination coverage that in the years before the pandemic was around eighty-three, eighty-five percent, which was already below the necessary threshold for measles.
Pero durante el COVID, esa cobertura cayó de manera significativa porque los sistemas de salud estaban colapsados, las campañas de vacunación se suspendieron, y millones de niños sencillamente no recibieron las dosis que les correspondían.
But during COVID, that coverage dropped significantly because health systems were overwhelmed, vaccination campaigns were suspended, and millions of children simply did not receive the doses they were due.
Esa brecha acumulada es la que estamos viendo explotar ahora.
That accumulated gap is what we're seeing explode now.
The accumulated gap.
That framing really matters.
Because what the numbers actually represent is three or four years of children who didn't get vaccinated, and now they're all in school together, in crowded markets, in exactly the kind of dense, interconnected communities where measles thrives.
Bangladesh es el octavo país más poblado del mundo, con unos ciento setenta millones de habitantes en un territorio más pequeño que Andalucía.
Bangladesh is the eighth most populous country in the world, with around one hundred and seventy million inhabitants in a territory smaller than Andalusia.
La densidad demográfica es brutal.
The population density is staggering.
Dacca es una de las ciudades más densamente pobladas del planeta.
Dhaka is one of the most densely populated cities on the planet.
En ese contexto, un virus con un R0 de quince no necesita ninguna ayuda adicional para propagarse.
In that context, a virus with an R0 of fifteen needs no additional help to spread.
Smaller than Andalusia, that's a comparison that lands.
And the health infrastructure has to be under enormous strain.
This isn't a country with excess hospital capacity sitting around waiting for an outbreak.
No, en absoluto.
No, absolutely not.
El gasto sanitario per cápita en Bangladesh es de unos cuarenta dólares al año.
Per capita health spending in Bangladesh is about forty dollars a year.
Para comparar, en España estamos alrededor de los tres mil.
For comparison, in Spain we're around three thousand.
Es una diferencia de dos órdenes de magnitud.
That's a difference of two orders of magnitude.
Y sin embargo Bangladesh ha hecho cosas notables en salud pública, sobre todo en mortalidad infantil y en la expansión de la atención primaria rural, pero esos logros dependen de que los sistemas funcionen, y el COVID los tensó al límite.
And yet Bangladesh has done remarkable things in public health, especially in child mortality and expanding rural primary care, but those achievements depend on systems functioning, and COVID stretched them to the breaking point.
I spent time in field hospitals across South Asia in the nineties.
The community health worker model, the door-to-door vaccinators, that was genuinely impressive work.
But it's fragile infrastructure.
You pull one thread and the whole thing can unravel faster than you'd expect.
Y lo que el COVID hizo no fue solo interrumpir esas cadenas de distribución de vacunas durante uno o dos meses.
And what COVID did was not just interrupt those vaccine distribution chains for one or two months.
Fue durante años.
It was for years.
UNICEF y la OMS publicaron en 2023 un informe devastador: en 2021 y 2022, el número de niños que no habían recibido ninguna vacuna, los llamados 'cero dosis', alcanzó su nivel más alto en treinta años.
UNICEF and the WHO published a devastating report in 2023: in 2021 and 2022, the number of children who had received no vaccines at all, the so-called 'zero dose' children, reached its highest level in thirty years.
Treinta años de progreso borrados en el tiempo que tardamos en fabricar las vacunas para el COVID.
Thirty years of progress erased in the time it took us to manufacture the COVID vaccines.
Thirty years.
That number is genuinely hard to absorb.
And the bitter irony being that we spent so much political and financial capital on COVID vaccines, which was absolutely necessary, but the disruption to every other vaccination program has barely been reckoned with publicly.
Eso es algo que me parece fundamental para entender lo que está pasando en Bangladesh, porque esto no es un fracaso únicamente bangladesí.
That is something I think is fundamental to understanding what is happening in Bangladesh, because this is not solely a Bangladeshi failure.
Es un fracaso sistémico global que se está manifestando allí primero por razones demográficas y estructurales.
It is a global systemic failure that is manifesting there first for demographic and structural reasons.
Pero que nadie se engañe: Europa también tiene sus problemas con el sarampión.
But let no one be deceived: Europe also has its problems with measles.
Tell me about Spain.
Because my instinct is that Western Europe considers itself vaccinated and done, but that's not quite the picture, is it.
Para nada.
Not at all.
España tuvo brotes significativos de sarampión en 2010, en 2011, en 2017 y luego de nuevo después del COVID.
Spain had significant measles outbreaks in 2010, in 2011, in 2017 and then again after COVID.
Y en muchos casos los focos estaban relacionados con comunidades con tasas de vacunación más bajas, ya sea por hesitación vacunal, ya sea por exclusión social, ya sea simplemente por dificultades de acceso al sistema sanitario.
And in many cases the clusters were linked to communities with lower vaccination rates, whether due to vaccine hesitancy, social exclusion, or simply difficulties accessing the health system.
El problema no es exclusivo de los países en desarrollo.
The problem is not exclusive to developing countries.
Lo que cambia es la escala y la velocidad con la que se propaga.
What changes is the scale and the speed at which it spreads.
Vaccine hesitancy is the phrase everyone reaches for, but I want to push on it a bit, because it can be a way of blaming individuals for a structural problem.
In Bangladesh, are we actually talking about hesitancy, or are we talking about access?
Esa es exactamente la pregunta correcta, y la respuesta es: las dos cosas, pero en proporciones muy distintas según el contexto.
That is exactly the right question, and the answer is: both, but in very different proportions depending on the context.
En Bangladesh, la causa predominante no es que los padres rechacen las vacunas, sino que el sistema no llegó a ellos durante la pandemia y no ha recuperado el ritmo todavía.
In Bangladesh, the predominant cause is not that parents are refusing vaccines, but that the system did not reach them during the pandemic and has not yet recovered its pace.
En Europa, en cambio, el componente ideológico de la hesitación es mucho más visible, y eso nos debería avergonzar bastante.
In Europe, on the other hand, the ideological component of hesitancy is much more visible, and that should embarrass us considerably.
The pediatrician I spoke to last year put it this way: hesitancy in wealthy countries is a luxury problem.
The parents who refuse vaccines almost always benefit from the herd immunity built by the parents who vaccinate.
They're free-riding on collective protection while denouncing it.
Es un análisis muy acertado.
It is a very apt analysis.
Y hay algo más que quiero mencionar porque creo que no se habla suficiente de ello: el sarampión no solo mata en la fase aguda de la enfermedad.
And there is something else I want to mention because I think it is not talked about enough: measles does not only kill in the acute phase of the disease.
Deja secuelas gravísimas.
It leaves serious lasting damage.
La encefalitis posinfecciosa afecta a uno de cada mil casos.
Post-infectious encephalitis affects one in every thousand cases.
La panencefalitis esclerosante subaguda, que es una enfermedad neurológica degenerativa y fatal, puede aparecer años después de una infección aparentemente leve.
Subacute sclerosing panencephalitis, which is a degenerative and fatal neurological disease, can appear years after an apparently mild infection.
El sarampión no es solo fiebre y manchas.
Measles is not just fever and spots.
And there's the immune amnesia angle, which I only learned about relatively recently.
Walk me through that, because it's one of the most counterintuitive things in all of infectious disease.
Es algo fascinante y aterrador a la vez.
It is something fascinating and terrifying at the same time.
Durante mucho tiempo se pensó que sobrevivir al sarampión te dejaba con una buena inmunidad.
For a long time it was thought that surviving measles left you with good immunity.
Y es verdad en lo que respecta al propio sarampión.
And that is true with respect to measles itself.
Pero resulta que el virus destruye entre el veinticinco y el setenta por ciento de los anticuerpos preexistentes que tienes contra otras enfermedades.
But it turns out the virus destroys between twenty-five and seventy percent of the pre-existing antibodies you have against other diseases.
Es decir, un niño que ha construido defensas contra la gripe, contra la varicela, contra múltiples patógenos, puede perder una parte sustancial de esa memoria inmunológica después de pasar el sarampión.
That is to say, a child who has built defenses against influenza, against chickenpox, against multiple pathogens, can lose a substantial part of that immunological memory after going through measles.
So the measles infection essentially resets the immune system.
The child doesn't just get sick with measles, they become vulnerable to every other infection they've ever fought off.
Exactamente.
Exactly.
Es lo que los investigadores llaman 'inmuno-amnesia'.
It is what researchers call 'immuno-amnesia'.
Y esto explica algo que los epidemiólogos observaban desde hace más de un siglo pero no entendían bien: las tasas de mortalidad infantil por otras causas, como neumonía o diarrea, suben notablemente en los meses posteriores a un brote de sarampión en una comunidad.
And this explains something that epidemiologists had been observing for more than a century but did not fully understand: child mortality rates from other causes, such as pneumonia or diarrhea, rise noticeably in the months following a measles outbreak in a community.
No porque el sarampión las cause directamente, sino porque ha debilitado las defensas de los niños que lo sobrevivieron.
Not because measles directly causes them, but because it has weakened the defenses of the children who survived it.
The ripple effect.
So when we count measles deaths, we're almost certainly undercounting the true toll, because the downstream mortality isn't attributed to measles, it's attributed to whatever finally kills the child.
Exactamente así.
Exactly right.
Y en Bangladesh, donde la desnutrición infantil sigue siendo un problema grave y los sistemas de salud ya están bajo presión, ese efecto secundario puede ser devastador.
And in Bangladesh, where child malnutrition remains a serious problem and health systems are already under pressure, that secondary effect can be devastating.
Un niño debilitado por el sarampión en un barrio pobre de Dacca no tiene el mismo colchón de recursos médicos que un niño en Madrid o en Austin.
A child weakened by measles in a poor neighborhood of Dhaka does not have the same cushion of medical resources as a child in Madrid or Austin.
That asymmetry is at the core of this whole thing.
The disease is the same.
The biology is identical.
But the outcome depends almost entirely on where you happen to be born.
Y ahí es donde la conversación sobre salud global tiene que volverse más honesta.
And that is where the conversation about global health has to become more honest.
Porque la comunidad internacional tiene compromisos adquiridos: la Agenda 2030, los Objetivos de Desarrollo Sostenible, los marcos de la OMS.
Because the international community has made commitments: the 2030 Agenda, the Sustainable Development Goals, the WHO frameworks.
Todos dicen lo mismo: nadie se queda atrás.
They all say the same thing: no one is left behind.
Pero cuando miras los datos reales de cobertura vacunal en los países de renta baja, la brecha entre el compromiso y la realidad es enorme.
But when you look at the actual vaccination coverage data in low-income countries, the gap between commitment and reality is enormous.
Gavi, the Vaccine Alliance, has done serious work on this.
But Gavi runs on donor contributions, and donor contributions are subject to political cycles.
When wealthy countries turn inward, the funding gets squeezed, and the consequences show up in places like Bangladesh.
Y eso nos lleva a algo que me parece que no se puede ignorar en este momento histórico concreto: estamos en un periodo de repliegue del multilateralismo.
And that brings us to something that I think cannot be ignored at this specific historical moment: we are in a period of retreat from multilateralism.
Los recortes en ayuda exterior de varios países, incluido Estados Unidos, están teniendo consecuencias directas en los programas de salud global.
Cuts to foreign aid from several countries, including the United States, are having direct consequences on global health programs.
No es retórica.
This is not rhetoric.
Es causalidad.
It is causality.
Menos dinero para vacunación en Bangladesh significa más niños sin vacunar, significa más brotes como el de hoy.
Less money for vaccination in Bangladesh means more unvaccinated children, means more outbreaks like today's.
That's a fair point and I won't dodge it.
The decisions being made in Washington right now about foreign assistance have names attached to them.
They have faces.
They have addresses in Dhaka.
Dicho esto, tampoco quiero que esto se convierta únicamente en una historia de recursos económicos, porque Bangladesh tiene también capacidad propia para actuar.
That said, I also do not want this to become solely a story about financial resources, because Bangladesh also has its own capacity to act.
El gobierno bangladesí tiene un programa nacional de inmunización que, cuando funciona bien, ha logrado cosas impresionantes.
The Bangladeshi government has a national immunization program that, when it works well, has achieved impressive things.
La pregunta es si tiene la voluntad política de priorizarlo ahora y de aceptar la ayuda internacional sin las fricciones burocráticas que a veces la entorpecen.
The question is whether it has the political will to prioritize it now and to accept international assistance without the bureaucratic friction that sometimes impedes it.
The WHO declared this outbreak a public health emergency.
What does that actually mean in practice?
Because I've seen those declarations made and then not much follows.
Técnicamente, una declaración de emergencia de la OMS activa mecanismos de coordinación internacional, facilita el flujo de recursos y de personal, y obliga a los países miembros a reportar información de manera más transparente.
Technically, a WHO emergency declaration activates international coordination mechanisms, facilitates the flow of resources and personnel, and requires member states to report information more transparently.
En la práctica, su eficacia depende de la rapidez con la que los Estados respondan.
In practice, its effectiveness depends on the speed with which states respond.
La OMS tiene mucha autoridad normativa pero poca capacidad de enforcement real.
The WHO has considerable normative authority but limited real enforcement capacity.
Es un órgano de coordinación, no un gobierno global.
It is a coordination body, not a global government.
Which is both its strength and its weakness.
I've seen it up close.
During the West Africa Ebola crisis in 2014, the delay between when the outbreak was obvious on the ground and when the formal declaration came was measured in weeks, maybe months, and people paid for that delay with their lives.
Y lo que también hace falta es que los medios de comunicación cubran estas historias con la seriedad que merecen, no solo cuando hay imágenes dramáticas o cuando la crisis desborda las fronteras.
And what is also needed is for the media to cover these stories with the seriousness they deserve, not only when there are dramatic images or when the crisis spills across borders.
El sarampión matando niños en Bangladesh no es una noticia de portada en Europa ni en Estados Unidos, y eso tiene consecuencias políticas.
Measles killing children in Bangladesh is not front-page news in Europe or the United States, and that has political consequences.
La presión ciudadana solo funciona si los ciudadanos saben lo que está pasando.
Public pressure only works if citizens know what is happening.
Proximity bias.
The news industry has a built-in proximity bias, and it's not just geography, it's also aesthetics.
A measles death in Dhaka doesn't have the visual drama that editors reach for.
It's a child with a fever in a crowded ward, and there are no explosions.
Y eso hace que hayamos dedicado este tiempo a hablar de ello, porque me parece que es exactamente el tipo de historia que un podcast como este debería contar.
And that is why we have spent this time talking about it, because it seems to me this is exactly the kind of story a podcast like this should tell.
No porque sea la más urgente políticamente en este momento, sino porque requiere contexto, requiere historia, requiere entender la epidemiología, para que la cifra 1.517 deje de ser un número abstracto y se convierta en algo que el oyente comprenda de verdad.
Not because it is the most politically urgent right now, but because it requires context, requires history, requires understanding the epidemiology, so that the figure 1,517 stops being an abstract number and becomes something the listener truly understands.
Agreed.
And if there's one takeaway, it might be this: measles coming back is not a mystery.
It's not bad luck.
It's a predictable consequence of predictable decisions, and that means it's also preventable.
We just have to choose to prevent it.
Completamente de acuerdo.
Completely agreed.
Oye, Fletcher, hay algo que dijiste antes que me quedé con ganas de preguntarte.
Hey, Fletcher, there's something you said earlier that I kept wanting to ask you about.
Usaste la expresión 'el margen de error es casi inexistente'.
You used the phrase 'the margin for error is almost nonexistent.' It's a good one, but in Spanish we might say 'no hay margen para el error.' Did you notice how I phrased something a little while back?
Es buena, pero en español podríamos decir algo como 'no hay margen para el error'.
I used 'aunque sea un poco' to express 'even a little.' It's a construction Spanish learners often overlook.
¿Te fijaste en cómo lo dije yo en un momento?
Usé 'aunque sea un poco' para expresar la idea de 'even a little'.
Es una construcción que los estudiantes de español suelen pasar por alto.
I caught that, actually.
'Aunque sea un poco.' The 'sea' threw me for a second, because the present subjunctive just shows up in the middle of an otherwise simple sentence.
Why not 'aunque es un poco'?
Buena pregunta.
'Aunque es un poco' works when you're describing something that is definitely true, a concession about a real fact.
'Aunque es un poco' funciona cuando describes algo que es definitivamente cierto, una concesión sobre un hecho real.
'Aunque sea un poco' introduces a hypothetical or indeterminate condition.
'Aunque sea un poco' introduce una condición hipotética o indeterminada.
In that context, I was saying that if vaccination coverage drops even a little, the virus finds its gaps.
En ese contexto, yo decía que si la cobertura vacunal baja aunque sea un poco, el virus encuentra sus huecos.
I don't know exactly how much it will drop, which is why I use the subjunctive.
No sé cuánto bajará exactamente, por eso uso el subjuntivo.
It's the difference between conceding a fact and raising a possibility.
Es la diferencia entre conceder un hecho y plantear una posibilidad.
So 'aunque es' is for what's already true, and 'aunque sea' is for what might be true, what could be true.
The subjunctive marking uncertainty rather than something being grammatically optional.
I think I've been using 'aunque' wrong for about three years.
Solo tres años, es un récord para ti.
Only three years, that's a record for you.
Pero no te preocupes, al menos no le has dicho a nadie que estás muy embarazado de haberlo hecho mal.
But don't worry, at least you haven't told anyone you're very pregnant about having got it wrong.