A Code Yellow Alert has been issued for all negative blood types. The Community Blood Center of the Ozarks says there is currently a less than two day supply of all negative blood types on hospital shelves and donations are needed immediately. There will be a blood drive at the Camden County Courthouse on Friday, March 28th from 11a.m. to 2p.m. to be eligible to give blood, you must weigh at least 110 pounds, be in good health and present a valid photo id.