What your neighbor is doing is not in your control. What is in your control is staying far enough away from them and washing your hands.

But, you should also have compassion. Everyone will be in a different place of fear and grief. It shows up in different ways.

Focus on what you can control. Solve the problems that you can and tackle what is in your influence, but accept the things that are out of your control and that you cannot solve. Let them go.