Very closely and it seems to be responsive to the vaccines and the treatments. in the u.k., trace, it has only gone to about 10% of cases. what does that mean to me? it is not going to predominant. what we've seen for months the delta variant is so transmissible, the basic delta variant, that it crowded everything out. that's what we need to keep focusing on and it will continue to be the predominant variant in my opinion. we don't have anything to compete with it. we have to get that stamped down and the case numbers are starting to decrease here. >> trace: the white house now rolling out pla...