is the journal of the National Childbirth Trust (NCT), the Digest is a separate section of it more directly aimed at NCT Antenatal teachers, Breastfeeding Counsellors, and Postnatal workers. Jeremy Brock is a Reader in Immunology at the University of Glasgow in Scotland. The Digest with his article is ISSN 1350-2735. E-mail me direct if you need more info. The National Childbirth Trust is a UK voluntary organisation focussing on 'informed choice' for parents, through antenatal classes, breastfeeding counselling, and postnatal support. And as an NCT tutor, I had better go and get ready for this month's tutorial which starts in 30 minutes!! Mary Broadfoot, Paisley, Scotland