Ramping up vaccine second doses in Alberta Effective immediately, every Albertan who received their first dose in April or earlier can book a second dose of COVID-19 vaccine. Some parts of this page will not display. JavaScript is not available in this browser or may be turned off. Alberta is a national leader in second doses, with 16.7 per cent of the eligible population already fully immunized. Now Alberta’s government is speeding up second-dose appointments ahead of schedule to help protect more people from COVID-19. Starting June 10, another 650,000 Albertans can start booking appointments through Alberta Health Services (AHS) and participating pharmacies and physician clinics.