First aid training saves lives, because a coworker is often the first person on the scene to help a seriously injured or sick employee.
Best practices guide: Fundamentals of a workplace first-aid program (OSHA) [PDF]
A summary of the basic elements for a first-aid program at the workplace.
First aid (Mayo Clinic)
Information to help you during a medical emergency.
Medical and first aid (OSHA)
Employers must provide medical and first aid to employees in line with their workplace hazards. This page defines the requirements of a first aid program.