An ambulance is a specialized vehicle used to transport people who require medical assistance to a healthcare facility, usually a hospital.

The American Red Cross is a humanitarian organization in the United States that provides emergency assistance, disaster relief, and education and training in various health and safety fields.

Basic life support (BLS) is a level of medical care which is used for patients with life-threatening illnesses or injuries until they can be given full medical care by advanced life support providers (paramedics, nurses, physicians).

A blood bank is a center where blood gathered as a result of blood donation is stored and preserved for later use in blood transfusion.

The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.

A certified first responder is a person who has completed a course and received certification in providing pre-hospital care for medical emergencies.

Under the Geneva Conventions, the emblems of the International Red Cross and Red Crescent Movement are to be worn by all medical and humanitarian personnel and also displayed on their vehicles and buildings while they are in an active warzone, and all military forces operating in an active warzone must not attack entities displaying these emblems.