[contentcards url=”https://www.france24.com/en/europe/20201211-covid-19-scientists-seek-to-reassure-public-on-pfizer-s-vaccine-safety-after-rare-side-effect” target=”_blank”] By Sébastian SEIBT The British vaccination campaign against Covid-19 had barely begun when it hit its first snag. On 9 December Two staff working for…