Canadian Blood Services is making a stop in Stratford today, during a critical time for the national organization.

Territory Manger Stephanie Wilkinson says the national inventory of blood used in emergency rooms, for research and treatment is low.

Donors can either show up or make an appointment online.

Wilkinson says universal O-negative donors are in the highest demand, but CBS needs all blood types.

O-negative is used in emergency situations when there isn’t time to determine a blood type if someone needs a transfusion or has suffered severe blood-loss.

The clinic runs today from 1:00pm to 7:00pm at the Christian Reform Church on Athlone Crescent.