If you had a weak immune system at the time of your first round of COVID-19 vaccination, you should have been offered an additional dose to give you better protection.
Talk to your hospital team or GP if you have not had your additional dose yet and you need one because of a weak immune system.
When you should get an additional dose
You should get an additional dose:
- at least 2 months after finishing your first round of COVID-19 vaccination if you are 12 or older
- at least 28 days after your second dose if you are aged 5 to 11
If you have had COVID-19 after your first round of vaccination, you need to wait:
- 3 months after symptoms or from the date of your positive COVID-19 test before getting an additional dose
First booster dose
If you are over 12 with a weak immune system, you should get a first booster dose at least 3 months after your additional dose.
Second booster dose
If you had a weak immune system at the time of the first round of vaccination or your first booster dose, you should get a second booster dose.
You may not be due to get a second booster yet. Get your second booster dose at least 4 months after your first booster.
Your second booster should be your fifth dose of COVID-19 vaccine.
How to get vaccinated
Your GP or hospital consultant will confirm if you should get a second booster at this time.
Book your COVID-19 vaccination now
Weak immune system list
People with the following conditions or treatments should follow the recommended COVID-19 vaccination on this page. This is because COVID-19 vaccines may be less effective for you than other people.
Your GP or hospital consultant will confirm if you should get an additional dose or second booster at this time.
You will need your GP or hospital consultant to confirm you have a weak immune system before booking your vaccination appointment.