- Infection-enhancing antibodies have been detected in symptomatic Covid-19
- Antibody dependent enhancement (ADE) is a potential concern for vaccines
- Enhancing antibodies recognize both the Wuhan strain and Delta variants
- ADE of Delta variants is a potential risk for current vaccines
- Vaccine formulations lacking ADE epitope are suggested
Background. The purpose of this study was to evaluate the necessity of COVID-19 vaccination in persons previously infected with SARS-CoV-2.