| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | biohazard symbol | Europe | The biohazard symbol is recognized in European culture as a warning for potential exposure to hazardous biological substances. | 1 |
| 2 | biohazard symbol | laboratory | The biohazard symbol in laboratory culture indicates the presence of potentially harmful biological materials. | 1 |