First of all, the mRNA Covid vaccines have proved highly effective, compared to influenza vaccines, for example. They're probably the most effective vaccines ev

First of all, the mRNA Covid vaccines have proved highly effective, compared to influenza vaccines, for example. They're probably the most effective vaccines ever developed for any respiratory virus. Secondly, EBV is a herpes family virus, which as a DNA virus is about as far removed from an RNA virus like SARS-CoV-2 as it's possible to get on the virus family tree. There's no reason to expect that the efficacy of a particular vaccine technology on one would have any relation whatsoever to that of the other!