<unk> is a term used to describe the<unk>  medically-trained<unk> to arrive on scene of an emergency, accident, natural or human-made disaster, or similar event.  Such people may be police or other law enforcement, firefighters, emergency medical services, search and rescue volunteers, or lay rescuers. In some countries they may also be people who have had significant<unk>  aid training (more than a<unk>  aider) who arrive at scenes of emergencies to deal with casualties until more advanced support arrives.
First responders
Outlier
Acute 
Triage
Recent changes
EC regimen
EP regimen
Complex 