I mean, people used to ask me 10, 15, 20, 25 years ago, Dr. Fauci, what is your worst nightmare? And I'm on the record, you know, you can go back and check it, of saying my worst nightmare, my fear, is the evolution of a brand new virus. That likely comes from an animal species, jump species from an animal reservoir, that's respiratory-borne, that easily transmits from person to person, and that has a high degree of morbidity and mortality.