What is Polygenic risk scores (PRS)?

A polygenic risk score is like a special report card that helps doctors guess how likely someone is to get certain diseases based on their genes.

Imagine your body has a bunch of tiny helpers, little genes, that work together to keep you healthy or make you sick. Some genes are like good friends who help you stay strong, and others are like tricky classmates who might cause problems later in life. A polygenic risk score adds up all these little helpers’ strengths and weaknesses, giving a single number that shows how much each person's genes might influence their chances of getting diseases like heart disease or diabetes.

Think of it like counting candy. If you have more pieces of candy (which means more "bad" genes), you're more likely to get sick. But if you have fewer pieces of candy (more "good" genes), you’re probably going to be healthier. Scientists use computers to calculate this score by looking at many different genes and how they work together.

This special report card doesn’t tell doctors everything, it’s not perfect, but it helps them understand your body's secrets a little better, just like knowing which classmates are more likely to help or cause trouble in class.