![](http://www.alamy.com/thumbs/6/7D544855-0B37-456A-B779-95B199F14C3F/CXD255.jpg)
Extreme macro of a drop of insulin on a hypodermic needle
Size: 5000px × 3333px
Photo credit: © roger ashford / Alamy / Afripics
License: Royalty Free
Model Released: No
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