Why is it important to record the batches of immunoglobulin?
Immunoglobulin is manufactured in batches. Several thousand donations of plasma are pooled in each batch. Very occasionally there are problems with some batches. For example, recently one batch of immunoglobulin caused some people to get an itchy rash. Because it was possible to see which batch was causing the rash, replacement immunoglobulin could be sent out quickly.