So, you know how there are medicines that you take when you're feeling sick or have an owie? The people who make those medicines have to do a lot of testing to make sure they are safe and work well before they can sell them to you.
But sometimes, there are very sick people who need a new medicine because the ones they are taking aren't helping them enough. The FDA has a special program called the "Fast Track Development Program" to help these people get new medicines faster.
The Fast Track program helps the medicine makers and the FDA work together to do the testing faster without skipping over important safety steps. This way, the new medicine can be tested and approved more quickly, and the sick people can get it faster to help them feel better.
It's like taking a shortcut to get to the store faster when you're really thirsty and hot. But, you still have to follow the rules of the road and wear your seatbelt to stay safe.