The Covid-19 vaccine is given as 2 doses, and it is important to have both. Your body builds up better protection to Covid-19 symptoms when the vaccine is given in two, smaller doses, with time in between.
New advice from the UK Chief Medical Officers is that the second dose of the vaccine remains effective when given up to 12 weeks after the first dose, and should be given towards the end of this 12 week period.
This will help ensure that as many people as possible benefit from the first dose of the vaccine as soon as possible. There are no safety concerns where people have already had their second dose earlier than 12 weeks after their first dose.