Tuesday, August 11 is the date of the Bloodmobile at Clarkfield Lutheran Church from 1 to 7 p.m. If you signed up for a time to donate at the last Bloodmobile, you have an appointment and are good to go. Appointments are necessary, so check with redcrossblood.org to see if there is a time slot for you. Donors will receive a free COVID-19 antibody test.