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Canada clears Johnson & Johnson vaccine

Canada is getting a fourth vaccine to prevent COVID-19 as the country's health regulator has cleared a Johnson & Johnson shot that works with just one dose instead of two, two officials familiar with the matter told The Associated ...

Comparing COVID-19 vaccines: How are they different?

Even if you're still waiting for a vaccine, watching the first people get their COVID-19 vaccinations may have felt like a huge relief. As the weeks pass, countless reports are coming out about the effectiveness of new vaccines ...

'Simple is beautiful': One-shot vaccine proves effective

The first one-shot COVID-19 vaccine provides good protection against the illness, Johnson & Johnson reported in a key study released Friday, offering the world a potentially important new tool as it races to stay ahead of ...

'Half-measure' virus vaccine intrigues experts

Evidence suggesting an initial half dose of the vaccine being developed by drugs firm AstraZeneca and the University of Oxford is more effective than a full dose is counterintuitive, and even took the researchers by surprise.

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