Information for people who are immunosuppressed

If you are aged 12 or over and have a severely weakened immune system, you will be offered a third dose and a booster (fourth dose) Covid-19 vaccine.

  • the first two doses may not have given you as much protection as they can for people who do not have a severely weakened immune system
  • a third dose may help give you better protection
  • a booster (fourth dose) helps improve the protection you have from your first three doses of the vaccine. It helps give you longer-term protection against getting seriously ill from Covid-19

Who can get a third and booster (fourth) dose?

If you have a severely weakened immune system. This includes if you had or have:

  • a blood cancer (such as leukaemia or lymphoma)
  • a weakened immune system due to a treatment (such as steroid medicine, biological therapy, chemotherapy or radiotherapy)
  • an organ or bone marrow transplant
  • a condition that means you have a very high risk of getting infections
  • a condition or treatment your specialist advises makes you eligible for a third dose and a booster (fourth dose)

You’ll usually be offered a third dose at least 8 weeks after you had your second vaccine.

You can get a booster (fourth dose) from 3 months (91 days) after your third vaccine.

Frequently Asked Questions about the third dose

Back to 'Who can get the Covid-19 vaccine?'

Page last updated 1 March 2023