![](http://www.alamy.com/thumbs/6/EE1DEA51-98AE-423A-BA21-57DADE116000/2C30J7R.jpg)
Man thinking about the virus and bacteria
Size: 3600px × 2400px
Photo credit: © Panther Media / Alamy / Afripics
License: Royalty Free
Model Released: No
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