Read the latest advice from ATAGI on who should get a fourth dose of COVID-19 vaccine.
How long will the COVID-19 vaccine last once I have had 2 doses?
It is not yet known how long the protection of the COVID-19 vaccine will last. We will know more through ongoing research. Clinical trials are currently happening to find out if we will need booster doses on an annual or longer basis.
What we do know is that evidence shows that all of the COVID-19 vaccines approved for use In Australia prevent severe disease, people going to hospital and dying.
Protection against getting infected does appear to wane over time. Protection against death and severe disease also drops over time, but more slowly. You can increase your protection by getting a booster from 3 months after your primary course.
An additional booster dose, or ‘fourth dose’, is recommended for people aged 50 years and older, people living in residential care, or people with a underlying health condition or disability. People aged 30 to 49 years old can also receive a fourth dose if they choose.
The additional booster is the fifth dose of the COVID-19 vaccine for eligible people who are severely immunocompromised.
Learn more about booster doses and fourth doses.
The aim of Australia’s COVID-19 vaccination program is to reduce COVID-19 related harm. Vaccines do this by preventing serious illness and death, and, as much as possible, transmission of the virus that causes disease.
With new COVID-19 vaccine developments every day, it’s normal to have questions or concerns, and possibly feel hesitant about getting a vaccine. That's why we're providing accurate, evidence-based answers to questions about COVID-19 vaccines.