John Croall
British Medical Journal, vol. 297, p.488
ISSN 0959-8138
August 1988
Dr John Asbury points out that "a computer virus is a small piece of computer code which has been maliciously inserted on computer storage media" (23 July, p 246). Although this is true in most cases, there remains the possibility that some of these viruses have "evolved" out of random mutations ofcomputer programs.