I think what this is, is ratcheting this up.

We felt that it would be important that we have a worst-case scenario to make sure our planning efforts were measured against that.

You couldn't stop it that way. But with social distancing, you might be able to slow it down, manage it within the confines of the medical system.

We need to be on a wartime footing. Innovation comes out of crisis.

The secretary or the chief of staff -- we have a discussion about flu almost every day.

We're not ready. If it happens tomorrow or next year, we're in trouble. It's a sobering picture.

If it was done in consultation with the WHO [World Health Organization] -- and with other governments that would make contributions, as well -- we would be more likely to consider it.

We felt it was best suited to have our preparation based on that worst case, which in recent history was 1918.