For a limited time, the American Red Cross is testing all blood, platelet and plasma donations for COVID-19 antibodies, providing donors insight into whether they have been exposed to this coronavirus. At the same time, there continues to be an urgent need for blood donations as hospitals resume surgeries and treatments that require blood products.

Antibody testing will indicate if the donor’s immune system has produced antibodies to this coronavirus, regardless of whether they developed symptoms. Donations will be tested using samples pulled at the time of donation and sent to a testi...