We go to the doctors when we are sick, and they help us feel better. But sometimes, doctors can make mistakes. Just like how you can make mistakes when you are doing something, like coloring or building with blocks.
These mistakes that doctors make are called medical errors. There are lots of different kinds of medical errors, but the most common ones are when the doctor gives the wrong medicine or dose of medicine, or when they forget to do something important.
For example, if the doctor said you needed medicine for a cold, but accidentally gave you medicine for a tummy ache, that would be a medical error. Or if the doctor forgot to wash their hands before touching you, that could also be a medical error because it could make you sick.
Medical errors can be very serious and can cause people to get even more sick, or even die. So it is very important for doctors to be careful and not make mistakes. That's why they have to go to school for a really long time to learn how to be good doctors and how to avoid making mistakes.