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Two men in biohazard suits and masks sampling water from a stream or river pipetting a sample into a test tube for chemical analysis of pollutants.
firefighter with hazmat (hazardous material) suits to protect them from danger chemical work on the accident road
A man in a protective chemical mask and a protective yellow suit with a banner in his hand with the words biohazard shows a stop sign. Biohazard concept
Biohazard neon light sign, biological hazard danger warning background. Bio hazard red blue symbol, chemical toxic, virus and bacterial dangerous waste, biohazard contamination restricted zone
Biohazard United States, Biohazard from United States, United States Quarantine

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