When the Covid-19 pandemic first struck, Christopher Chiu and other researchers wondered: Should they inject healthy people with the virus that caused the pandemic?
The idea sounded counterintuitive, but by carefully dosing individuals with SARS-CoV-2 in a controlled setting — like Chiu had been doing for more than a decade with seasonal flu and RSV — scientists could study how the virus affects the body and learn what factors may offer protective benefits.
