I’m aware of the study. It was performed in a lab using samples taken from donors. It showed that there is a level of cross-reactivity. There is no data on this providing immunity in the real world. There have been no challenge studies, nor any epidemiological studies (with such a small sample size, this would be difficult anyway) to demonstrate whether any of this actually has any impact on SARS-CoV-2 infections.
Maybe you should put your tagline to use.
That’s not what you said above, and you have a history of misinterpreting what studies say anyway.