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Polio.jpg (12 kB, định dạng MIME: image/jpeg)


Polio poliomyelitis virus Work of the US government From en.wikipedia pt: poliomielite

Public domain This image is a work of an Environmental Protection Agency employee, taken or made during the course of an employee's official duties. As works of the U.S. federal government, all EPA images are in the public domain.

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