Canadian Blood Services is asking people to book and keep their already scheduled appointments as blood inventory reaches levels of concern.

Many blood types are needed, especially O-Negative, O-Positive, B-Negative, A-Negative and A-Positive.

Saskatchewan currently needs to fill 538 appointments to meet sufficient inventory levels for the rest of July.

Cancer patients, accident victims, and people with immunodeficiency, autoimmune and neurological disorders rely on blood, platelets, and plasma donations every day.

Same day appointments are available every day at many donor centres and community events across the country.

Book now at blood.ca, use the GiveBlood app or call 1 888 2 DONATE.