Yes, but it's uncertain when those vaccines will be available or whether they will work. Even as a backup plan, it makes sense to me to evaluate variolation.

Yes, but it's uncertain when those vaccines will be available or whether they will work. Even as a backup plan, it makes sense to me to evaluate variolation. With millions of lives worldwide and the entire global economy on the line, you do not want to put all your eggs into even ten baskets. As for the time and effort, I'm assuming that the existing vaccine developments are adequately staffed. There are many other medical researchers that are working on other things that could work on this.