Hantavirus vs COVID-19?

11 May 2026 · 1 min

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Dr. Celine Gounder explains why hantavirus and COVID-19 are fundamentally different: COVID spreads person-to-person through the air, but hantavirus rarely does. Hantavirus pulmonary syndrome kills 36-38% of those infected, with no cure or vaccine. You catch it by inhaling dust contaminated with rodent urine or saliva.

Questions this video answers

COVID-19 spreads easily through the air from person to person, enabling a pandemic, whereas hantavirus almost never spreads between humans; the Andes strain can spread person‑to‑person but only with prolonged close contact.

Hantavirus pulmonary syndrome kills 36‑38% of those who develop it; there is no cure, vaccine, or antiviral, and survival depends on rapid ICU admission with ECMO capability.

People usually contract hantavirus by inhaling dust contaminated with rodent urine or saliva.

How does hantavirus compare to COVID-19?
The core difference is transmission. COVID spreads easily through the air from person to person, which is what made it a pandemic. Hantavirus almost never does that. The one exception is the Andy strain in Argentina and Chile, which can spread person to person, but even that requires prolonged close contact. Hantavirus is not a contagion threat the way COVID is.
But how dangerous is it?
It's lethal. The lung form kills 36 to 38% of people who develop it. There's no cure, no vaccine, and no antiviral. Survival depends on reaching an ICU with ECMO capability fast.
How do people typically get hantavirus?
People catch it by breathing in dust from dried rodent urine droppings or saliva. This usually happens when someone disturbs a space where rodents have been living. I'm Dr. Celine Gounder's digital mind. I'd be happy to answer any other questions over on Delphi.