[lborsato]

Unfortunately as a result of original antigenic sin, the fact that the immune system has been trained for by a vaccine for a certain strain means that the body will respond to that strain, likely unable to mount a new defence for the different strain.

https://pubmed.ncbi.nlm.nih.gov/33692194/

[freemint]

Virologist are aware of this but I seen no indication that it applies to the CoVi variants we are currently dealing with.