How can more covid-19 vaccines be made available?

BIOMEDICINE HAS never seen anything like it. This time last year, no company had ever made a vaccine against SARS-CoV-2, the virus that causes covid 19, on an industrial scale. By the middle of this April a billion doses had been delivered. According to Airfinity, a data provider, a second billion doses are expected by June 1st. On current estimates the world’s pharmaceutical companies look set to provide 10.9bn doses over the course of 2021.