Canadian Blood Services says more than four thousand people have donated blood since a ban stemming from concerns about mad cow disease was lifted last month.
People who had lived or travelled for an extensive period of time in the U-K, Ireland or France in the 1980s and 1990s were previously ineligible to donate.
There were worries that people might have eaten beef contaminated with mad cow disease at that time.
But after almost 30 years of research and surveillance, Health Canada determined that it was safe for people who had been in those countries during those years to donate blood.
Canadian Blood Services lifted the ban on December 4th.
Spokesperson Ron Vezina says the agency is very happy with the response so far and that maintaining the blood supply requires a total of 100-thousand new donors every year.