Free images results:
 

Aid pictures, stock photos and images

 
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Aid Stock Photography
Aid
Author: Gobigpicture
Help 1 Royalty Free Stock Photo
Author: Lleha
Red cross 1 Royalty Free Stock Photos
Author: Lleha
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
First aid Stock Image
Author: Hyrons