Dr, Theresa Tam said the single-shot Johnson & Johnson vaccine, manufactured by Janssen, was shown to be 66 per cent effective overall in preventing moderate to severe COVID-19, while the AstraZeneca vaccine was found to have an efficacy of 62 per cent in generally preventing “symptomatic COVID-19.”
Both vaccines, she said, were found to protect against severe disease, meaning that those who got COVID-19 after the shot were much less likely to get seriously ill.
Since when do you get the disease after you've had the vaccine against it? From the website of the Centers for Disease Control & Prevention, Vaccines: The Basics
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