Mij
Senior Member (Voting Rights)
"What happens when previously infected individuals are vaccinated? The observations in several studies, including those by Stamatatos et al. and Reynolds et al., are that an impressive synergy occurs—a “hybrid vigor immunity” resulting from a combination of natural immunity and vaccine-generated immunity. When natural immunity to SARS-CoV-2 is combined with vaccine-generated immunity, a larger-than-expected immune response arises".
https://science.sciencemag.org/content/372/6549/1392
https://science.sciencemag.org/content/372/6549/1392