The U.K. Has Approved a Vaccine. Here’s What Happens Next

Now that Britain has become the first western country to approve a Covid-19 shot, the spotlight shifts to the high-stakes rollout. Vaccinating the country’s roughly 67 million people won’t happen overnight. The U.K. has ordered enough doses of the two-shot Pfizer-BioNTech vaccine to immunize 20 million people.

The government plans to prioritize as it begins to deploy the vaccine, starting with residents and staff in care homes, then moving to people over 80 years old and health-care workers, documents show.