Yes that is right. While the idea of using such a strain as a vaccine directly was the focus of my first post, this was controversial. Even if you think it is

Yes that is right. While the idea of using such a strain as a vaccine directly was the focus of my first post, this was controversial. Even if you think it is too risky to use a natural attenuated strain as a vaccine, such as strain would be very useful as a tool to accelerate other vaccines. As I said in my first post how to use any such strain is not up to me, but if it can be used to get us to a vaccine sooner it is worth looking into. If we are going consider doing a challenge trial we should at first make the effort to see if we can find a safer strain to use.