problem is, this isn't true. Please don't perpetuate a lie… It does not help the cause, and just feeds the sleepers' belief that we're all wacko. (not that i care what they think... but if truth isn't truth, its not truth)
https://www.redcrossblood.org/local-homepage/news/article/covid-19-vaccination-guide-blood-donation.html

It appears that Red Cross IS accepting donations from covid vax recipients. Red Cross is corrupt. Hopefully if you need blood you have a trustworthy donor source. I pray God will help us.

In addition, it is probably a good idea to be extra cautious with mosquitoes.

https://www.redcross.org/about-us/news-and-events/news/2021/what-you-need-to-know-about-covid-19-vaccines-and-blood-donation.html