Print County officials pleaded for patience Thursday as scheduling issues, and long wait times for service, plagued San Diego’s coronavirus vaccination system. Many say they are struggling to schedule first or second appointments and those visiting local vaccination super stations, especially the one across the street from Petco Park, reported hours-long waits for service Thursday morning. Acknowledging the situation in a weekly COVID-19 briefing, county officials clicked their way through a new interactive map that shows the region’s growing number of vaccination sites. But many, including Sue Lussa, a retired San Diego State University journalism teacher, said they were less concerned about finding the locations than they were about actually managing to secure appointments in what has become a rather Darwinian exercise that seems determined to see who is able to stay at their computer the longest, loading and re-loading appointment pages that always seem to be full.