The Red Cross is urging people to donate blood or platelets this holiday season to ensure there is enough blood available to help people in need.

All blood types are needed to ensure hospitals remain stocked.

People can make an appointment to give blood, platelets or plasma with the Red Cross by downloading the Red Cross Blood Donor App, visiting RedCrossBlood.org, calling 1-800-RED CROSS.

An opportunity to donate blood in Seattle is scheduled from 1 p.m. to 6 p.m. Dec. 28 at the American Red Cross Seattle Chapter, 1900 25th Ave. S.

The Red Cross is testing blood, platelet and plasma donations for COVID-19 antibodies. The test may indicate if the donor’s immune system has produced antibodies to this coronavirus, regardless of whether an individual developed COVID-19 symptoms. Red Cross antibody tests will be helpful to identify individuals who have COVID-19 antibodies and may now help current coronavirus patients in need of convalescent plasma transfusions. Convalescent plasma is a type of blood donation collected from COVID-19 survivors that have antibodies that may help patients who are actively fighting the virus.

Learn more about convalescent plasma and sign up to give at RedCrossBlood.org/Plasma4COVID.