The premier says as long as there are no more vaccine shipment delays, everyone should be able to have their second dose by the end of the summer.
Under the plan, anyone who received their first dose in March can book a second shot immediately.
NACI officials now say a first dose of the AstraZeneca-Oxford vaccine can safely be combined with a second dose of the Pfizer-BioNTech or Moderna shots "unless contraindicated".
Alberta is expanding its rollout of second-dose COVID-19 vaccines, allowing everyone over age 12 who has had a first shot to book a booster before the end of the month.
There have been 41 confirmed or suspected cases of vaccine-induced thrombotic thrombocytopenia - a rare but serious blood clotting syndrome potentially linked to AstraZeneca - across Canada, and five people have died.
"After carefully reviewing the evidence from other jurisdictions, while AstraZeneca is still a good choice, we will offer Albertans a choice", Shandro said.
Nearly all of the public health regulations are expected to be rescinded by early July.Hinshaw has said Alberta's reopening plan will succeed as long as Albertans continue to exercise caution, physically distance, mask-up and get their vaccinations as soon as possible.
Albertans will be able to schedule second-dose appointments in the order they received their first doses.
The move to Stage 1 occurred as the province reached the benchmarks of having the first dose of the COVID-19 vaccine in more than 50 per cent of the eligible population and hospitalization numbers below 800.
As of Tuesday, Stage 1 of the plan is in effect allowing for patio dining, personal services by appointment and additional organized gatherings.
Also, restaurant patios will reopen, allowing for up to four diners within the same household per table.
Funerals may have 20 people, while weddings may have 10.
Each step of Alberta's three-step reopening plan is tied to vaccination rates.
The number of new COVID-19 cases in Alberta has dropped by more than 40 per cent in the last week as hospitalizations continue to decline.
"We could hit Stage 3 with a fully open summer as early as June 28", he said.
On Monday, Alberta reported 263 COVID-19 cases and a 5.9 positivity rate.
Currently, the province has met both thresholds, as the number of people hospitalized due to COVID-19 dropped to only 478 on Saturday.
However, K-Days announced Tuesday it will not go ahead this summer.