I know pfas levels are immediately lower after the donation. I’m not under the impression that pfas levels stay low for very long i.e. long enough to safely donate blood again.

Plasma donations can be done more frequently, though, so that might be actually effective way to reduce contamination.

But, it’s kind of messed up that we’re donating contaminated blood and/or plasma. Is that good for the people that use our blood? Who knows!