The agency says many people have been canceling appointments
There's a blood supply shortage nationwide.
Canadian Blood Services says that's due to a slew of unfilled or cancelled appointments over the past few months.
There were 31,000 fewer donors than before the COVID-19 pandemic, putting more pressure on a smaller number of people willing to contribute.
Canadian Blood Services has 25,000 empty appointments to fill before the end of the busy Christmas and New Year periods.

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