All we know about the vaccine is that Spain has 140 million on order.
We do not know which will arrive first, or how quickly the 140 million will be manufactured and delivered to Spain.
The guess is that the first supply, if and when approved, will be the Pfizer vaccine.
This has major logistical problems.
The published plan is that the first vaccinations will start sometime in January.
This will be phase 1 which will be care homes and front line health workers, plus high risk disabled people (and possibly also their close family members).
There is no decision yet regarding the order for phase 2, which it is planned will start in March.
The focus will be on reducing deaths and taking the pressure off the health system.
That means concentrating on high risk people first, probably people over 64 years of age.
As for reducing the spread of the virus, no-one yet knows whether the vaccine will do this.
We do not know whether you can still transmit the virus even if you have received the vaccine.
We will not know this for many months, maybe several years.
The vaccine will give you resistance to the virus, helping your immune system to fight it.
We do not know how long that resistance will last.
So precautions will last for a long time still, and expect more restrictions before the summer.