Actually that's what convinced me to get the vaccine, the fact of how the new bioengineering for mRNA worked. I was convinced that it would be highly successful and effective. And I honestly don't believe the theories that it's effectiveness is somehow wearing off. It's much more likely that it's just not effective against Delta+mutations as that is so far from the original variant the vaccine was designed for. I don't plan to get any booster shots until a new delta variant vaccine is available.