CALGARY -- A walk-in vaccination clinic set up at the Telus Convention Centre reached capacity just an hour after opening on Tuesday but more slots were added as thousands of Albertans lined up and logged in on Tuesday to receive the AstraZeneca shot. Albertans born in 1981 and earlier are now able to walk in to the largest mass vaccination site in the province at the Telus Convention Centre as part of the effort to get the AstraZeneca vaccine distributed quickly. Before Tuesday, the only Alberta Health Services clinic to accept walk-ins was located at the Calgary office building on Southport Road in the southwest.