AstraZeneca working to adapt Covid-19 vaccine to new strains

AstraZeneca said Thursday it's working with the University of Oxford to adapt its COVID-19 vaccine to protect against new strains of the virus as public health officials raise concerns about mutations that may make the virus more resistant to existing vaccines. The Anglo-Swedish drugmaker worked with Oxford to develop one of the first COVID-19 vaccines authorized for widespread use. AstraZeneca said it hopes to cut the time needed to produce large amounts of any new vaccine to between six and nine months.