Yeah, one cannot, not explicitly. Delay is inevitable unless the actor dies 
You do have options, though:
- a
Branchthat uses a boolean variable to control what goes through:
- a
Gatethat is open by default:
- a
Timer(we’re not using Delay at all):
Any other BP (the medkit) can use the handle to clear the timer.
I have a blueprint set up to cause fire to attach to the character I have
Depending on the complexity of what you’re building, consider looking into Actor Components. For example:
- a fire component can contain the entire logic describing what it means to be on fire and all the behaviour that goes with it
- a component like that can be dynamically spawned on any actor and will affect it
- using a medkit would mean destroying that component
Think of it as of modules of functionality that you can add and remove from actors.