The NHS is carrying out the biggest mass vaccination marketing campaign in its historical past with a jab that shields towards Covid-19.
Some persons have been shocked to master how a process which generally takes at least ten several years could have been carried out in much less than a single.
What basic safety checks have been designed to get the Covid vaccine to this issue?
BBC overall health correspondent Laura Foster explains.
Online video by Laura Foster, Terry Saunders, Mel Lou and Kate Forbes.