Since Pima Countyâs COVID-19 vaccine registration site went live Thursday morning, nearly 80,000 qualifying residents have registered. However, Pima County doesnât have enough vaccines to administer to all registrants, said Pima County Communications Director Mark Evans. Although demand for vaccines is outstripping the supply, Evans said more appointments will be added as the county receives its weekly vaccine allotment from the state. Those in the priority 1B groupâwhich includes individuals over 75, educators and protective service workersâcan register at any time, but r...