Overestimating population immunity contributed to US Delta variant surge
When the delta variant of SARS-CoV-2 hit the United States in summer 2021, it led to a larger-than-expected surge in cases, hospitalizations and deaths. New Penn State research suggests this lack of preparedness may have been partially due to overestimating the number of U.S. citizens who were immune or partially immune to the virus.
Source: psu.edu
