A reason for optimism on Omicron: Our immune systems are not blank slates (STAT News)

STAT News: A reason for optimism on Omicron: Our immune systems are not blank slates. “The emergence of a new Covid-19 variant with a startlingly large constellation of mutations has countries around the world sounding alarms. While the concerns are understandable, experts in immunology say people need to remember a critical fact: Two years and 8 billion vaccine doses into the pandemic, many immune systems are no longer blank slates when it comes to SARS-CoV-2.”