#NACI (Canada's advisory board of vaccine scientists) has summarized the latest science: they recommend mRNA over AstraZeneca as the 2nd dose of #COVID19 vaccine. Here's why... 1/n canada.ca/en/public-heal…
1) It seems to be more EFFECTIVE. AZ-mRNA and mRNA-mRNA appear to give a more effective immune response against variants of concern (and the delta variant is spreading in Canada), based on small studies + big real world experience. 2/n
2) It appears to be SAFE. We mix and match a lot of vaccines, safely, and the aforementioned studies + experience show the safety of AZ-mRNA too. 3/n
3) It reduces the RISK OF VITT to zero. We believe the risk of VITT is <1 in 655,000 with 2nd dose AZ. It is zero with mRNA vaccines. 4/n
Remember that Health Canada approves vaccines for use & monitors safety, NACI gives advice, and your province makes the ultimate decision on who gets what. No province has indicated it will forbid 2nd dose AZ. It is still your choice to get it if you wish. Or get mRNA. 5/n
If you just got your 2nd dose AZ, you may be worried! But remember, you were probably comfortable with AZ the first time around. You know what to look for with regards to VITT. You will be fine. You made the GOOD choice to get TWO doses, which means you're fully vaccinated. 6/n
This has been a rollercoaster ride. We are nearing the end. Get your 2nd shot. Help your loved ones, your community to get their 2nd shot (or their 1st). We'll smother the embers of this virus through vaccination and public health measures. I promise. 7/7
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