Oxford Scientists: These Are Final Steps We're Taking to Get Our Coronavirus Vaccine Approved

Of the hundreds of potential Covid-19 vaccines in development, six are in the final stages of testing, known as phase three clinical trials. One of these--ChAdOx1 nCoV-19--is the vaccine we're developing at the University of Oxford. To be approved, vaccines need to go through multiple rounds of testing to show that they're safe and effective. […]