1. Under the heading 'Virus':
- the wording: 'Unconventional agents associated with (i)' is replaced by: 'Unconventional agents associated with the transmissible spongiform encephalopathies (TSEs)';
- the following agents are added under 'Unconventional agents associated with the transmissible spongiform encephalopathies (TSEs)', and are classified as follows after the entry for Creutzfeldt-Jakob disease:
- 'variant Creutzfeldt-Jakob disease', classified as group 3 (**), with the notes 'D (d)'.
- 'Bovine spongiform encephalopathy (BSE) and other related animal TSEs (i)', classified as group 3 (**), with the notes 'D (d)'.

2. The wording of footnote '(i)' which follows the list of viruses is replaced by the following:
'There is no evidence in humans of infections caused by the agents responsible for other animal TSEs. Nevertheless, the containment measures for agents categorised in risk group 3 (**) are recommended as a precaution for laboratory work, except for laboratory work relating to an identified agent of scrapie where containment level 2 is sufficient.'