Q&A: The AstraZeneca/Oxford vaccine is 70.4% effective. How does it work?

The AstraZeneca/Oxford University vaccine has been shown to be 70.4% effective and possibly up to 90%

Researchers have been working on a coronavirus vaccine (University of Oxford/PA)

The AstraZeneca/Oxford University vaccine has been a frontrunner in the race to find a coronavirus jab and has been shown to be 70.4% effective and possibly up to 90%.

– How does the AstraZeneca/Oxford vaccine work?