This phenomenon is known as “superimmune” or “mixed immunity”.
Reuters news agency cited research showing that people with a mixed immune system are people who have been infected with the SARS-CoV-2 virus, and then received a vaccine using mRNA technology. Not only do their bodies produce large amounts of antibodies, but these antibodies are highly flexible, capable of fighting the many variations that are raging in the world.
The “superantibodies” will also be effective against any future variants, the researchers say, because they can neutralize the SARS-CoV-1 virus, the original strain of the virus. caused the SARS epidemic in 2003.
However, those who possess this “super antibody” are still very few.