Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, was the guest on the latest quarantine edition of The Daily Show with Trevor Noah, offering his insights on what makes COVID-19 so insidious.

He had particularly pointed advice for younger people about the spread of the virus: “Even though you are young, you are not absolutely invulnerable,” Fauci said. “So, you have a responsibility, not only to protect yourself but you almost have a societal, moral responsibility to protect other people.”