Scientists around the world are racing to create a vaccine for Covid-19, and one of the leading contenders is the UK jab being developed by Oxford University and the Anglo-Swedish pharmaceutical company AstraZeneca.
The AstraZeneca-Oxford vaccine as it’s come to be known has been making headlines all week – but not all have been positive.
The team behind the jab initially announced it had an overall 70 per cent success rate at preventing Covid-19 but that rates varied from 62 per cent to 90 per cent depending on the dose given.
It then emerged some test patients had been given a lower does than they should have by accident – but these were the ones with the higher efficacy. There have also been questions about the relatively small number given the lower, more effective dosing regime, and the fact tha