Thank you.
If I have time, I'd like to pivot to Dr. Tunis. Thank you for being here today.
My question is around the ongoing evaluation of vaccine effectiveness. As I understand it, for the new bivalent vaccines, we don't have as yet the clinical effectiveness data. I'm sure that's expected in the future. Maybe you could comment on the antibody response data versus expected clinical effectiveness data, and how that might add to your recommendations.