I Eat Danger for Lunch
Snakes are not always a symbol of good fortune. If you see a snake, the best course of action is to flee from it and never look back. We know in Harry Potter that snakes are enchanted beings that consume humans and turn them into Horcruxes. Some snakes, on the other hand, aren’t dangerous at all.
The Rod of Asclepius has come to be the internationally recognized symbol of health and healing. The single snake winding around the road protects people from bad ailments and infections, which is certainly appropriate for this individual’s scar. No one can say whether it’s a work in progress or if the staff acts as an unseen rod because no one knows what’s going on here.