‘So who is capable of mounting this "superhuman" or "hybrid" immune response? People who have had a "hybrid" exposure to the virus. Specifically, they were infected with the coronavirus in 2020 and then immunized with mRNA vaccines this year. "Those people have amazing responses to the vaccine," says virologist Theodora Hatziioannou at Rockefeller University, who also helped lead several of the studies. "I think they are in the best position to fight the virus. The antibodies in these people's blood can even neutralize SARS-CoV-1, the first coronavirus, which emerged 20 years ago. That virus is very, very different from SARS-CoV-2."
Read here (NPR, Sept 7, 2021)