PORTLAND — The American Red Cross is looking for blood donors. And in honor of Black History Month this February, and in the spirit of Dr. Charles Drew, an African-American surgeon who was the first medical director of the American Red Cross and a modern blood-banking pioneer, eligible donors as diverse as the patients who need their blood donations are encouraged to give blood to ensure a sufficient blood supply.

Blood from a donor with a similar ethnic background as that of the patient is less likely to cause complications, particularly for those patients whose chronic conditions require repeated transfusions, said American Blood Cross spokeswoman Mary Brant in a news release. Sickle cell disease is one such chronic condition affecting as many as 100,000 people in the United States.

Prior to transfusion, blood type and Rh factor are matched between donated blood and the patient in need. In some cases, additional red cell markers in donated blood must be matched, as well. These markers are best found in blood from donors of a similar ethnicity, she said.

With seasonal flu and inclement winter weather preventing many regular donors from giving, the Red Cross urges healthy, eligible donors to make an appointment to donate blood in the coming days and weeks. All blood types are currently needed to help maintain a diverse and sufficient blood supply, especially types O negative, A negative and B negative.To learn more about donating blood and to schedule an appointment, download the Red Cross Blood Donor App, visit redcrossblood.org or call 1-800-RED CROSS (1-800-733-2767).

Here is a schedule of upcoming blood donor clinics in York County set for February:

Ӣ Feb. 5, 2 p.m. Р7 p.m., Mason Greenleaf 117 Cornish, 142 Maple Street, Cornis

Ӣ Feb. 7, 8 a.m. Р1 p.m., South Berwick Town Hall, 180 Main St., South Berwick

Ӣ Feb. 8, 9 a.m. Р3 p.m., SCU Walgreens Sanford, 868 Main St., Sanford

Ӣ Feb. 9, 1:30 p.m. Р6:30 p.m., Trinity Episcopal Church, 403 Main St., Saco

Ӣ Feb. 11, 10 a.m. Р4 p.m., University of Southern Maine, 37 College Ave., Gorham

Ӣ Feb. 13, 1 p.m. Р6 p.m., Acton Ambulance Association, 1725 Route 109, Acton