05/14/2026
Horseshoe bats have coexisted with SARS-like coronaviruses for millions of years without ever getting sick. Humans, as the world learned in 2020, are not so fortunate…
A new study authored by Jyoti Batra, Magdalena Rutkowska, and colleagues from QBI UCSF, Gladstone Institutes, and Icahn School of Medicine at Mount Sinai shows how tiny viral changes can reshape infection across species.
Researchers mapped hundreds of protein interactions between SARS-CoV-2, a bat coronavirus, and both human and bat cells—and found something striking:
One small change in a viral protein (Orf9b) flips the outcome.
• In humans: it shuts down immune signaling
• In bats: a different protein interaction helps control infection
The team also built a new bat lung cell model to study how these viruses behave in their natural reservoir host.
Same virus family. Different biology. Big implications for how we think about spillover risk.
Learn more: link in bio. 🦇