Coinfection is when someone has more than one disease or illness at the same time. Just like when you have a cold and a fever at the same time, that is an example of coinfection.
When someone has a coinfection, it can sometimes be more complicated to figure out what is causing their symptoms because there is more than one thing going on in their body. It is important for doctors to identify all of the infections that a person has so they can give the right treatments and help the person feel better.
Sometimes, having a coinfection can also make a person sicker than if they just had one of the infections. This is why it is important to take good care of our bodies and avoid getting sick in the first place. Washing our hands, eating healthy foods, and getting enough rest can all help prevent coinfections.