Mixing Covid-19 vaccines ‘could ease supply shortages’ as Oxford study looks at which jabs and when

Mixing doses of different Covid-19 vaccines could help tackle supply shortages, but more trials are needed to find the best combinations and dose intervals, experts say.The latest study, led by the University of Oxford, suggested that a vaccine cocktail of AstraZeneca’s shot followed by Pfizer’s four weeks later increased side-effects such as fatigue and headaches.But the study, of 830 people aged over 50, has yet to show how well the combination defends against the coronavirus.The study did…

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