Linn County residents aged 65 and older can begin receiving a COVID-19 vaccine on a limited basis starting Tuesday, county public health officials announced.Residents interested in getting a shot will have to schedule an appointment — but because availability of the vaccine is very limited at this time, officials warn those appointments will fill up quickly.Beginning Monday, residents who qualify will be contacted by their primary care provider to schedule an appointment to receive the first shot of the vaccine for the novel coronavirus.