![Trial participant being given the Pfizer/BioNTech vaccine Trial participant being given the Pfizer/BioNTech vaccine](https://static.euronews.com/articles/stories/05/17/41/68/1200x675_cmsv2_25a33158-4c77-56ad-b633-a3de488306ed-5174168.jpg)
Video. How do the three COVID-19 candidate vaccines work?
there are substantial differences between them, including their composition, price and distribution capacity.
there are substantial differences between them, including their composition, price and distribution capacity.