We are responsible for your protection from now on.

We are responsible for your protection from now on.

As you're going down, and walking down the sidewalk during the day, you have to think that if there is a dispute, there's somebody in society who sees it as their job to affirmatively protect you if you're acting reasonably.

The second challenge we had was in contrast to the smallpox vaccine, which was very stable, and a single dose protected you for life the polio vaccine is incredibly fragile.