Okay, so the National Center for Health Statistics is a big group of people who work together to keep track of how healthy people are in the United States. They collect information about things like how many babies are born each year, how many people get sick, and how many people die.
It's kind of like if you were playing a game with your friends and one person was in charge of keeping score. The National Center for Health Statistics is like the person keeping score for the game of how healthy the country is.
They use this information to figure out what kinds of things are making people sick or keeping them healthy. This can help doctors and other people who work in healthcare make better decisions about how to take care of people.
Overall, the National Center for Health Statistics is a really important group of people who help make sure that everyone in the United States is as healthy as they can be!