| Infectious substances, Category A | All viruses of risk group 4, and some cultures of viruses and bacteria of risk group 3. |
| Infectious substances, Category B | Most bacteria and viruses of risk group 3 and all bacteria and viruses of risk group 2 as well as any other microorganisms (parasites, fungi etc.) |
| Medical waste | Waste derived from medical treatment of humans or animals or from bio-research, containing category B infectious substances. |
| Genetically modified (micro)organisms | Microorganisms in which genetic material has been altered through genetic engineering. |
| Plant pathogens | Microorganisms which are capable of causing diseases in plants. |
