Andes hantavirus infection is the major exception to the usual “hantavirus does not spread person-to-person” rule.
The Andes strain, found mainly in Argentina and Chile, has documented human-to-human transmission. That makes it statistically and epidemiologically more comparable to respiratory viruses like COVID-19 than North American hantaviruses are — but it is still nowhere near as contagious.
Key statistical comparisons
Category
Andes Hantavirus
COVID-19
Human-to-human spread
Yes, documented
Yes, highly efficient
Main transmission
Close contact/body fluids + rodents
Airborne respiratory spread
Estimated fatality rate
~30–40%
Much lower overall
Contagiousness
Low-moderate
Very high
Outbreak size
Usually small clusters
Global pandemic scale
Incubation
~1–6 weeks
Usually days
Total global cases
Very rare
Massive
Contagiousness (R0)
The reproduction number (R0) for Andes virus is believed to be relatively low — often estimated around or below 1 in most outbreaks.
For early COVID strains, R0 estimates were roughly:
Original strain: ~2–3
Delta: ~5–8
Omicron variants: often >8
That means COVID spread exponentially more efficiently.
Fatality rate
Andes hantavirus remains dramatically deadlier per infection than COVID.
Approximate comparison:
Andes hantavirus: ~1 death per 3 infections
COVID overall population average: far lower, especially after vaccines and immunity
Why Andes virus spreads differently
Researchers think Andes virus can spread through:
prolonged close contact
saliva/respiratory secretions
household exposure
sexual contact in some suspected cases
But unlike COVID, it generally does not spread casually through brief public encounters.
Important epidemiological distinction
COVID became a pandemic because infected people:
transmitted before symptoms,
spread through normal breathing/talking,
and infected many people quickly.
Andes virus transmission usually requires much closer and longer exposure, limiting outbreak size.
Real-world outbreak example
A notable Andes virus outbreak occurred in southern Argentina in 2018–2019, where chains of person-to-person transmission were documented.
Even then, the outbreak remained relatively contained compared with coronavirus waves.
Bottom-line statistical comparison
Andes hantavirus is far deadlier per infection.
COVID is far more transmissible.
COVID caused vastly more total deaths because of its scale.
Andes virus is unusual among hantaviruses because it can spread between humans, but it still behaves more like a limited outbreak pathogen than a pandemic virus.
I think this assumes a symmetrical battlefield. It isn’t. The right has an entire media ecosystem designed to launder bullshit like “Obama secret lab created scary virus to kill Americans, and the caravans are bringing it from South America” and cement it into the rotted brains that mainline them. The left doesn’t have this, nor do they really need it right now when “it’s the economy, stupid.”
The Dems have to do something in spots like this. Get on social media, get on Meet the Press and pound the table. It’s not even an unreasonable question! The head of HHS is a lunatic with brainworms who plays with roadkill for fun, what is his admin doing about protecting Americans from hantavirus? Do they have a plan if it spreads? This is the kind of stuff an opposition party is supposed to do.
Your average American has no idea if this is going to be serious or not, make it clear to them that the administration is completely asleep at the wheel during a potential crisis.
I’ve studied enough about this amoeba to know never to swim in any sort of pond in the south. Good news is the only known method of infection is water up your nose.
There was a geothermal area in NZ that had a spot that was popular for swimming, but came with the warning to not put your head underneath the water because of the risk of brain-eating amoeba (I think it’s the same as this one). Yeah, didn’t put any part of my body underneath that water.
All the people saying this won’t be an issue as this virus has been around for ages and never caused an issue. I am pretty sure that was true for Covid as well until it aquired a mutation that made it an issue.
Nah, you convince them to snort brain-eating amoeba water to ward off hanta virus, because the former is a whole lot more than a few mutations away from becoming an airborne pandemic.
I would not be surprised at all if some disgruntled lab worker decides they aren’t paid enough, bets everything on the pandemic, then spreads it everywhere.
Ordinarily, Roess said, Centers for Disease Control and Prevention experts would have been part of the teams sequencing the virus. Now, the U.S. might have to learn about results secondhand.
