I'm sure this varies by country, and it may have changed since then anyway, but when I became a donor in Norway about 15 years ago they definitely told me they did more extensive testing when doing the initial vetting and blood sample than they did after I started donating. They definitely did some testing on each donation, like hemoglobin to check if I'd need iron supplements, and probably the usual suspects in terms of disease, but they claimed the initial one was more thorough.
I'm not familiar with the guidelines for Norway so it definitely could be different. In the US is typical for blood from multiple donors to be pooled and all tested in one batch. Any positive well cause them to discard all units from donors in that pool.
5
u/Spearsy23 15d ago
They do test every sample just fyi