COVID vaccines have unquestionably made a huge difference during this pandemic. For example, it’s estimated COVID shots have saved more than 1.4 million lives in the World Health Organization’s (WHO) European region alone since their introduction in December 2020.
Unfortunately, SARS-CoV-2 (the virus that causes COVID) has continued to change quite quickly, and this affects how well immunity generated from both vaccination and past infection protects us. This issue is often referred to as “immune evasion”.
