What is happening now?
With that being said, the same thing has been found for the blood samples that were from the 1990s. People had immunity to variants of the virus from the recent past, but not to those from the future. This means that this virus kept evolving and managed to evade immunity.
After he finished his study. Jesse Bloom stated that seeing how fast SARS-CoV-2 evolves, it can be said that it’s actually a parallel with 229E. Delta and Omicron and dangerous versions that carry several mutations which block the potency of antibodies that were raised against past variants of Covid-19.
It is believed that the powers of this “antigenic change” are more likely to grow even stronger, as most people gain immunity through infection, vaccination, or both.