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Medical Symbols

Biohazard Symbol

Biohazard Symbol

What it means

The trefoil biohazard symbol warns of infectious or potentially infectious biological materials. It appears on waste bags, laboratory equipment, and containers holding blood, cultures, or medical sharps.

Where you will see it

Clinical waste bins, laboratory doors, specimen containers, and PPE disposal points.

What you should do

Follow local protocols for handling, PPE, and disposal. Never open sealed biohazard containers without training.

Common mistakes

  • Disposing of clinical waste in household bins.
  • Removing biohazard labels from containers before proper decontamination.

Tags

  • medical
  • biohazard
  • infection control
  • laboratory

Related Symbols

More symbols from Medical Symbols.

Frequently Asked Questions

Biological substances present that pose a health risk. The trefoil biohazard symbol warns of infectious or potentially infectious biological materials. It appears on waste bags, laboratory equipment, and containers holding blood, cultures, or medical sharps.

Follow local protocols for handling, PPE, and disposal. Never open sealed biohazard containers without training.

The Biohazard Symbol is widely recognised, though labelling standards and local regulations can differ slightly by region. SymbolBuddy focuses on the most common version you are likely to see. If you spot a variation, compare it with the description and tags on this page for context.

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