PITTSBURGH (KDKA) — Vitalant has declared a critical shortage of blood, saying blood providers nationwide have less than a two-days’ supply of necessary blood types.

They say they strive for a four-day supply.

The shortage comes after a busy holiday season where they saw 21,000 fewer donations than expected.

If you would like to help, you can schedule an appointment to donate by calling 877-258-4825 (877-25-VITAL) or visiting this link.