You appear to be quoting from a different article. Here's the relevant bit from the BBC article: >The trial involved 30,000 people in the US with half being gi

You appear to be quoting from a different article. Here's the relevant bit from the BBC article: >The trial involved 30,000 people in the US with half being given two doses of the vaccine, four weeks apart. The rest had dummy injections. >The analysis was based on the first 95 to develop Covid-19 symptoms.