The three Covid-19 vaccines are from Pfizer-BioNTech, the University of Oxford and Astra-Zeneca and Moderna.
The Pfizer, Oxford and Moderna vaccines every require two doses and you aren’t absolutely vaccinated till per week after your second shot.
But there are lots of variations between them.
BBC well being correspondent Laura Foster seems at how a lot immunity they provide, how they forestall an infection and which one is healthier.
Video by Mel Lou, Laura Foster, Terry Saunders and Mattea Bubalo