From Thor Simpson
Helen Thomson writes that transfusions of young blood may help treat age-related conditions such as Alzheimer’s and heart disease (23 August, p 8).
Given that there are about 2 million blood transfusions in the UK every year, and that the blood services and hospitals keep detailed records, could the research benefit by analysis of this existing data?
There are a large number of variables, but even if only the transfusions that were required for a physical loss of blood were considered, there should still be a huge number to work with.
Oxted, Surrey, UK
