All the time it’s a part of life
This is how vaccines are used. You introduce the antibodies in a vaccine so the person builds up an immunity and never develops the disease
A good way to find that out is to calculate the number to get an estimate. for example, about one in every 12 people has asthma. so take the population of new york, and divide it by 12 to get an estimate of a number of people in the state of new york that might have asthma.
Goals don't give anything to your future it shapes it. Let's say if you like soccer and you like to play music, you can set a goal to become a good soccer player and then you wanna learn music.