Czlyydwr Llrngwl
"Sell ya a door Learn gull" Czly/Celly for short.
- Joined
 - Jan 10, 2015
 
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the Red Cross FAQ said:Donated red blood cells do not last forever. They have a shelf-life of up to 42 days. A healthy donor may donate every 56 days.
MSKCC said:
There you go.
Sauce-age:
Red Cross FAQ
Memorial Sloan Kettering Cancer Center article
'cause the more you know!