In terms of contact tracing, yes, I am satisfied with the performance of the contact tracing system in this outbreak. I would note a couple of things. Delta got a head start. It was circulating in the community for a week before we even knew that it was there, and, as a result, there are still some linkages in those early cases that have been difficult to identify. So we know what our clusters are, and there are multiple different sub-clusters, I should say—it's all one cluster, but multiple different sub-clusters. The linkages between those haven't, in some of those sub-clusters, been easy to identify, and that is because of the head start that Delta got on us.