My guess is that flu-like symptoms come from a flu-like cause; not giving blood.

A co-worked used to go regularly with me to donate even though EVERY time he donated, he passed out when he stood up. I doubt that I would have continued to donate, but he did--even advising them that he had a history of passing out, and they'd give him extra time and a drink--he'd still pass out--even if only for a few seconds.

__________________
1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags