The donated blood does not get cleaned. There is a screening step that looks to throw out blood with (some) infections. There is also a separation step to split

The donated blood does not get cleaned. There is a screening step that looks to throw out blood with (some) infections. There is also a separation step to split red blood cells, platelets, and plasma (recipients have variable needs) before storage and eventually use. EDIT: it’s worth mentioning that the screening step does include some filtration. White blood cells do get pulled out of the blood, but I’m not sure how common it is for a lab to do that. Here are some interesting links: https://www.webmd.com/a-to-z-guides/news/20010126/blood-filtration-debate-highlights-cost-vs-care-dilemma https://www.webmd.com/a-to-z-guides/news/20010126/blood-filt... https://www.youtube.com/watch?v=fS42C1GOyvM https://www.youtube.com/watch?v=fS42C1GOyvM