A2 · Elementary
12 min
virologypandemic preparednesspublic healthecology
The Virus and the Ship: The Science of Hantavirus
El virus y el barco: La ciencia del hantavirus
A cruise ship carrying passengers infected with Andes virus docks off Cape Verde and later the Canary Islands. Fletcher and Octavio explore the science of hantavirus: what it is, how it works, and why the Andes strain is uniquely and deeply alarming.
Un crucero con pasajeros infectados por el virus de los Andes llega a Cabo Verde y después a las Islas Canarias. Fletcher y Octavio exploran la ciencia del hantavirus: qué es, cómo funciona y por qué el virus de los Andes es diferente y más peligroso.
8 essential A2-level terms from this episode, with translations and example sentences in Spanish.
| Spanish | English | Example |
|---|---|---|
| virus | virus | El virus vive en los ratones. |
| contagiar | to spread / to infect | El virus se contagia de persona a persona. |
| pulmones | lungs | El virus ataca los pulmones. |
| ratón | mouse | El ratón lleva el virus pero no está enfermo. |
| peligroso | dangerous | Este virus es muy peligroso para los humanos. |
| natural | natural | Los virus cambian. Es un proceso natural. |
| medicina | medicine | No hay medicina específica para este virus. |
| barco | ship | El barco está cerca de las Islas Canarias. |
There's a detail in this week's news that I keep turning over in my head, and it's not the geopolitics, it's not the ceasefire talks, it's a cruise ship sitting off the coast of Cape Verde with passengers who have hantavirus.
Sí.
Yes.
El barco se llama MV Hondius.
The ship is called the MV Hondius.
The MV Hondius.
Three passengers confirmed, two more suspected, and at least 145 people still on board.
They eventually docked at the Canary Islands.
And the thing that caught me was the specific strain: Andes virus.
Which, if you know anything about hantavirus, that detail matters enormously.
El virus de los Andes es especial.
The Andes virus is special.
Es muy peligroso.
It is very dangerous.
And that's exactly where I want to start.
Because I think most people hear the word hantavirus and they have a vague memory of a news story from the nineties, somewhere in the American Southwest, and then it fades.
But the science here is genuinely fascinating and a little unsettling.
El hantavirus es un virus de los ratones.
Hantavirus is a virus from mice.
Right, rodent-borne.
You don't catch it from another person in most cases, you catch it from contact with infected rodent droppings, urine, or saliva.
Inhaling contaminated dust is the most common route.
Which raises an obvious question about a cruise ship.
Sí, eso es raro.
Yes, that is strange.
Un crucero no tiene ratones.
A cruise ship does not have mice.
Exactly.
So the working theory is that passengers were infected before boarding, somewhere during earlier excursions.
The Hondius is an expedition ship, not a Caribbean poolside vessel.
It does Antarctic and South American routes.
And the Andes virus is endemic to Argentina, Chile, Bolivia.
Someone was ashore.
Someone touched the wrong thing.
El virus vive en un ratón pequeño.
The virus lives in a small mouse.
Se llama colilargo.
It is called the long-tailed mouse.
The long-tailed colilargo mouse.
Oligoryzomys longicaudatus.
It lives across the Andean foothills and Patagonia, and it carries the Andes virus without getting sick itself.
Which is how these things work, right?
The reservoir host has adapted.
El ratón está bien.
The mouse is fine.
El problema es para los humanos.
The problem is for humans.
The problem is absolutely for humans.
Hantavirus Pulmonary Syndrome, which is what the Andes strain causes, kills roughly thirty to forty percent of people who develop it.
That is an extraordinarily high case fatality rate.
For context, seasonal flu kills less than one percent.
Sí.
Yes.
El virus ataca los pulmones.
The virus attacks the lungs.
Los pulmones se llenan de agua.
The lungs fill with water.
Pulmonary edema, technically.
The lungs fill with fluid as the immune system overreacts to the infection.
And here's the grim part: there's no specific antiviral treatment.
Doctors essentially manage the symptoms and hope the patient's immune system wins.
Intensive care, oxygen, sometimes a ventilator.
No hay una medicina específica para este virus.
There is no specific medicine for this virus.
None.
Which should give pause.
We're talking about a virus with a forty-percent kill rate and no targeted treatment.
The reason it hasn't become a pandemic is mostly geography and transmission mechanics.
But the Andes virus complicates that picture significantly, and I want to get into why.
Primero, la historia.
First, the history.
El hantavirus es nuevo para los científicos.
Hantavirus is new for scientists.
The discovery story is extraordinary.
Spring of 1993, Four Corners region of the American Southwest, at the intersection of New Mexico, Arizona, Colorado, and Utah.
A young Navajo man dies suddenly with severe respiratory failure.
Days later his fiancée dies with identical symptoms.
Medical investigators are baffled.
Muchas personas mueren.
Many people die.
Nadie sabe por qué.
Nobody knows why.
Twenty-four deaths in a matter of weeks, across multiple states.
The CDC descends on the region.
It takes them about five months of intensive investigation to isolate the pathogen.
They eventually identify a previously unknown hantavirus, which they name Sin Nombre, the virus with no name.
Which, given what it does to people, feels like a very dark joke.
Sin Nombre.
Sin Nombre.
Sí, es un nombre muy triste.
Yes, it is a very sad name.
The reservoir for Sin Nombre turned out to be the deer mouse, Peromyscus maniculatus.
Common throughout North America.
That year there had been unusually heavy rainfall in the Southwest, which caused a boom in plant life, which caused a boom in the deer mouse population.
More mice, more droppings, more human exposure.
A cascading ecological sequence that killed people.
La naturaleza cambia.
Nature changes.
Los animales cambian.
Animals change.
Los humanos tienen un problema.
Humans have a problem.
That's the pattern with so many of these spillover viruses.
Climate, ecology, human incursion into wild habitats.
The pathogen was always there.
The conditions just aligned.
After 1993 researchers start looking globally and find hantaviruses everywhere.
In Europe, Asia, South America.
The Sin Nombre outbreak hadn't created a new threat, it had illuminated one that already existed.
Y en Sudamérica, encuentran el virus de los Andes.
And in South America, they find the Andes virus.
Found in Argentina and Chile in the mid-nineties.
Similar to Sin Nombre in how it causes disease.
Similar kill rate.
But researchers notice something that should have prompted significantly more alarm than it did.
El virus de los Andes se contagia de persona a persona.
The Andes virus spreads from person to person.
And that is the thing that separates it from virtually every other hantavirus known to science.
Every other strain, you need the rodent.
You touch the droppings, you breathe the dust, the virus enters you.
There's no human-to-human chain.
The Andes virus broke that rule.
Solo el virus de los Andes hace eso.
Only the Andes virus does that.
Es único.
It is unique.
As far as we know, yes.
A 1996 cluster in Argentina documented clear person-to-person transmission.
A doctor treating patients developed the illness.
So did caregivers.
The epidemiological chain was unmistakable.
This is a hantavirus that, unlike all its cousins, has at least partially cracked the puzzle of moving between humans.
Pero la transmisión es lenta.
But the transmission is slow.
No es como la gripe.
It is not like the flu.
That's the important caveat and I'm glad you named it.
The Andes virus doesn't spread easily.
Close, prolonged contact with a symptomatic person seems to be required.
Not a sneeze across a subway car.
But here's the virologist's anxiety: the virus demonstrably has the genetic capacity to spread between humans.
What separates 'slow human-to-human transmission' from 'efficient human-to-human transmission' is often a small number of mutations.
Los virus cambian.
Viruses change.
Eso es normal.
That is normal.
Es un proceso natural.
It is a natural process.
Normal, inevitable, and in this case worth watching very closely.
The Andes virus is on a number of pandemic preparedness watchlists for exactly this reason.
Not because it's likely to become the next global catastrophe, but because it has already demonstrated something that almost no other hantavirus has.
And we have no vaccine.
No antiviral.
Just ICU care.
No hay vacuna ahora.
There is no vaccine now.
Pero los científicos trabajan en eso.
But scientists are working on that.
Several candidates in early-stage trials.
South Korean researchers have done the most work, partly because Asia has its own serious hantavirus problem.
A different family of strains there causes hemorrhagic fever with renal syndrome rather than pulmonary syndrome.
Different organs fail, same rodent-spillover mechanism.
The hantavirus family is wider than most people realize.
En Asia, el hantavirus ataca los riñones.
In Asia, hantavirus attacks the kidneys.
En América, ataca los pulmones.
In America, it attacks the lungs.
Same viral family, different outcomes depending on the specific strain.
Which tells you something about the evolutionary diversity within this virus group.
The name 'hantavirus' itself comes from the Hantan River in South Korea, where a 1950s outbreak among American soldiers during the Korean War was eventually linked to a rodent-borne pathogen.
Though people probably had it for centuries without knowing what it was.
Los roedores y los humanos viven juntos desde siempre.
Rodents and humans have always lived together.
Since agriculture.
Since the first grain stores.
You keep grain, you attract mice, you get exposure.
Researchers think that some mysterious disease outbreaks in historical records, in medieval Europe, in ancient China, may have actually been hantavirus.
We just didn't have the tools to know.
El virus existía.
The virus existed.
Los humanos no sabían el nombre.
Humans did not know the name.
And the cruise ship situation brings this back to something practical.
The Hondius passengers who are sick are being evacuated to the Netherlands for treatment.
Three confirmed.
Two suspected.
The incubation period for Andes virus is one to five weeks, which means some people still on that ship may not yet be showing symptoms.
The public health challenge of managing exposure on a closed vessel is real.
En un barco, todos están juntos.
On a ship, everyone is together.
Eso es un problema.
That is a problem.
The Canary Islands authorities did the right thing letting it dock.
Spanish citizens on board, medical resources needed.
But the anxiety among Canarians about a repeat of COVID-era quarantine situations is completely understandable.
People remember what it looked like when an infected cruise ship needed a port and nobody wanted it.
Sí, recuerdo eso.
Yes, I remember that.
Los barcos sin puerto.
Ships without a port.
Es muy triste.
It is very sad.
The broader lesson here, and I think this is worth sitting with, is that the pandemic preparedness conversation almost always focuses on respiratory viruses, influenza variants, coronaviruses, because those spread efficiently.
But the Andes virus is a reminder that nature has other experiments running.
Viruses that kill forty percent but spread slowly are, from an evolutionary standpoint, still working on their efficiency.
La naturaleza no para.
Nature does not stop.
Los virus no paran.
Viruses do not stop.
Which is not a counsel of despair, to be clear.
It's a reason for sustained funding, sustained surveillance, sustained research into antivirals that work against this family.
The mRNA platform that gave us COVID vaccines could theoretically be pointed at hantavirus.
We just haven't had the institutional will to prioritize it.
Oye, antes usas una frase curiosa.
Hey, earlier you use an interesting phrase.
Dices 'se contagia'.
You say 'se contagia'.
I did, yes.
I've been trying to borrow phrases from you.
Did I get it wrong?
No, está bien.
No, it is fine.
Pero el 'se' es importante.
But the 'se' is important.
El virus 'se contagia'.
The virus 'spreads'.
El 'se' indica que pasa solo.
The 'se' shows that it happens by itself.
So it's not 'the virus spreads it' with an active agent, it's more like 'spreading happens,' the action folds back on itself.
We have something similar in English with reflexive constructions but we don't use it nearly as systematically.
In Spanish this 'se' shows up constantly, right?
Sí.
Yes.
'La puerta se abre.' 'El agua se calienta.' 'El idioma se aprende.' El 'se' es natural en español.
'The door opens.' 'The water heats up.' 'The language is learned.' The 'se' is natural in Spanish.
The language is learned.
El idioma se aprende.
I find that one particularly pointed given what we're doing here.
So when you said earlier 'el virus se contagia de persona a persona,' that 'se' is doing real grammatical work, it's marking that the transmission happens as a process, not because someone is actively doing it to someone else.
Exacto.
Exactly.
Y es más natural que decir 'el virus contagia'.
And it is more natural than saying 'the virus infects.' That sounds strange.
Eso suena raro.
More natural and, in a weird way, more accurate to what's actually happening.
The virus isn't intentionally doing anything, the process is just unfolding.
Right.
El idioma se aprende.
I'm going to hold onto that one.
And on that note, I think we've done justice to a genuinely strange and important science story that got swallowed by the geopolitics this week.
Sí.
Yes.
El hantavirus es pequeño pero es serio.
Hantavirus is small but it is serious.
No es para olvidar.
It is not to forget.