Dr. Yaffee said the man had vaccine induced thrombotic thrombocytopenia - or VITT - which caused his death.
Williams said last week that those who got their first dose of AstraZeneca between March 10 and March 19 during a pilot project at some pharmacies and doctors' offices will be prioritized for the second dose.
AstraZeneca has been linked to rare, potentially fatal blood clots, prompting several provinces to recently stop using it as they await further research.
Almost one million people in Ontario aged 40 and older have received the AstraZeneca vaccine.
The AstraZeneca vaccine inoculation is scheduled to be held between June 7 to July 27 for the first dose of the vaccine.
He added that South Sudan failed to use its doses because of a slow initial uptake by health workers, delays by Parliament to approve the vaccine's use, and a lengthy training of people to administer the vaccine.
The first cohort of Ontarians who received the shot March reported booking headaches and a lack of clarity as they sought to schedule their second jabs on Tuesday.
U.S. again blocks 'unhelpful' Security Council statement on Israel, Gaza violence
Bassem Issa is the highest-ranking military figure in Hamas to be killed by Israel since 2014, according to The Associated Press. Other air strikes hit what Israel's military said were rocket launch sites, Hamas offices and the homes of Hamas leaders.
"We're seeing now with some new data from the United Kingdom that people who get two doses, as [time] goes on, their immunity keeps getting stronger and stronger, approaching some of that equal to the mRNA vaccines", he said.
Though the recommended interval between shots is at least 12 weeks, the second injection is being offered to that group after 10 weeks in order to make use of the 45,000 doses nearing expiration.
He says if you don't get your second shot early, there's no reason to panic.
In March, South Sudan received 132,000 doses from Covax but the country's national taskforce on Covid-19 chose to return before they expire after discussing the matter with the World Health Organization (WHO).
Those who got their first shot of AstraZeneca between March 10 and March 19 became eligible to book their follow-up appointment on Tuesday but many have already taken to social media to complain after discovering that the pharmacy where they received their first shot is not administering second doses.
Meanwhile, the AstraZeneca vaccine was 60% effective against symptomatic disease caused by the variant.
At that time, Chief Health Protection and Emergency Preparedness Officer Dr. Jessica Hopkins said the risk of VITT associated with the vaccine in Ontario was one in 60,000. "We took the advice that the best vaccine is the first one you're offered and we're more than happy to take the AstraZeneca, but now I feel we might fall through a crack here". "I will be honest and say I would be slightly concerned that we don't minimise the level of changes unless there is a very clear public health argument in favour of it because the vaccination programme really is working now", he told Deputy Kelly.