From the CDC:
"Children and teens react, in part, on what they see from the adults around them. When parents and caregivers deal with the COVID-19 calmly and confidently, they can provide the best support for their children. Parents can be more reassuring to others around them, especially children, if they are better prepared.
Watch for behavior changes in your child.
Not all children and teens respond to stress in the same way. Some common changes to watch for include: