| Well-characterised cell lines of human or ape origin | Containment level 2 and use of biosafety cabinet |
| Well-characterised non-human and non-ape cell lines with low risk of endogenous infection with human pathogens |
| Cell lines or strains not fully characterised or authenticated | Containment level 2 and use of biosafety cabinet |
| Cells with endogenous pathogens and deliberately infected cells | Appropriate pathogen containment |
| Human blood cells, lymphoid cells, nervous tissue of human or simian origin | Containment appropriate to the potential risk |