aid assistance availability care casualties casualty-care cross danger directions emergency emergency-care fatality-reduction first-aid first-aid-procedures harm-reduction help helpful immediate-assistance initial-treatment injuries injury international-symbols life-preservation life-saving location medical-attention minimising-pain one-time-treatment prepared protection providing-emergency-help readiness ready recovery red red-cross rescue safety safety-response short-term-treatment sign signs symbols text treatment white-on-green-cross wording