From Paul Dove
Andy Coghlan asks: “After decades of clinical failures and ethical controversy, could 2008 mark a new dawn for artificial blood?” (5 January, p 11).
Unfortunately, I can’t see how it will mark an end to ethical controversy, since the article goes on to say that the new substitute uses “haemoglobin extracted from cow blood”.
This is obviously a big ethical problem for most vegetarians and many Hindus.
Hampton, Middlesex, UK
