The public health advice we received is that physical distancing should be maintained whenever possible. We put in place a system of several measures—I'll call it a layered approach—where there's no one single point of failure. That's why we have the questions, the physical observations, the face masks, the configuration of the aircraft in some cases, and the personal protective equipment worn by flight attendants for their interactions with passengers. There are myriad different points to minimize the risk of transmission. It's not one individual measure but a number of them.
On June 22nd, 2020. See this statement in context.