Scientists just debunked the legendary myth that bats have "super-immune systems" that protect them from deadly viruses.
April 16, 2026
Original Paper
Viral disease outcomes are indistinguishable between experimentally infected bats and rodents
bioRxiv · 2025.08.28.672855
The Takeaway
After 86 years of assuming bats were special biological outliers that could carry Ebola and Coronaviruses without getting sick, a massive meta-analysis shows they actually die at the same rates as rodents. There is no magical "bat immunity" that makes them invincible to these pathogens. This is a huge deal because much of our pandemic preparedness was based on studying bats to find their "secret sauce." If they aren't actually more resilient than other mammals, we need to rethink why they are so good at spreading viruses to humans. It turns out bats might just be in the wrong place at the wrong time, not biological superheroes.
From the abstract
A common explanation for bats being a conspicuous source of zoonotic viruses is their purported ability to coexist with viruses without suffering overt disease. This belief has catalyzed the discovery of unique features of bat immune systems which may have translational value as broad-spectrum antivirals, particularly if they evolved as a byproduct of bats' unique life history rather than through conventional co-evolutionary processes. Surprisingly, whether bats compared to other host groups suf