Here's my two cents on this for what it's worth:
Use common sense. Know yourself. If you are going to go out and hike something that is low risk for you, go do it. When you travel to wherever you want to hike, use common sense in interacting with the environment. Minimize human contact, wash hands, etc etc.
If you are attempting something that is higher risk, i.e., something where a rescue is possible, it is probably best to avoid that right now. These rescue crews may have to quarantine afterwards and that makes it harder to help others. Once the cases start declining, use reasonable judgment in adding in higher risk activities.
