Recommended timing gaps for different COVID-19 vaccines

The interval gap (or ‘dosing interval’) is the minimum time between COVID-19 vaccines. Times vary depending on how many COVID-19 vaccinations you’ve already had, what vaccine type you’re getting, and if you’ve recently had COVID-19. Some vaccine combinations may also require a prescription. The interval gap is to ensure vaccine effectiveness and safety.

Last updated: 5 May 2022

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First dose and second dose minimum gap 

First dose 

Second dose 

Minimum gap 

Age

Pfizer 

Pfizer 

3 weeks 

12 and over

Pfizer paediatric (child)  

Pfizer paediatric (child) 

8 weeks 
* this gap can be shortened to 3 weeks in limited circumstances, such as prior to the initiation of significant immunosuppression or international travel 

5 to 11

Novavax 

Novavax 

3 weeks 

18 and over

AstraZeneca 

AstraZeneca 

4 weeks 

18 and over

Pfizer 

AstraZeneca 

4 weeks 
Prescription needed 

18 and over

Pfizer 

Novavax 

4 weeks 
Prescription needed 

18 and over

All other combinations

4 weeks 
Prescription may be needed – discuss with your GP or healthcare provider 


Second dose and booster minimum gap 

*These interval times are the same if you’ve had a third primary dose and you’re getting a booster. 
 

Second dose 

Booster 

Minimum gap 

Age

Pfizer 

Pfizer 

3 months 

18 and over
Pfizer Pfizer 6 months 16 or 17

AstraZeneca 

AstraZeneca 

3 months 
Prescription needed 

18 and over

Pfizer 

AstraZeneca 

3 months  
Prescription needed 

18 and over

All other combinations 

3 months 
Prescription might be needed – discuss with your GP or healthcare provider


Second dose and third primary dose minimum gap 

(Severely immunocompromised people only) 

Second dose 

Third primary dose 

Minimum gap 

Age

Pfizer 

Pfizer 

At least 8 weeks 
Prescription needed – discuss with your GP or healthcare provider 

5 and over

All other combinations 

Prescription needed – discuss with your GP or healthcare provider 


How to get a prescription 

If you need a prescription, prior to your appointment at the vaccination clinic, visit your preferred GP to discuss your options. Appointments to discuss COVID-19 vaccine options and obtain a prescription are free. 

It's also possible to get a prescription at a vaccinating AstraZeneca or Novavax clinic when you arrive for your appointment – first, you’ll need to talk with the vaccination site’s clinical lead.  

Severely immunocompromised people who wish to receive a third primary dose will need to get a prescription from their usual healthcare provider. We recommend you schedule a free appointment with your usual healthcare provider. 

COVID-19 vaccine: Severely immunocompromised people 


Non-COVID-19 vaccines 

If you’re having a Zostavax shingles vaccine, a 7-day gap before or after a COVID-19 vaccine is recommended.  

For Novavax, a 3-day gap is needed for if you’re having a Shingrix shingles vaccine, or the Fluad Quad flu vaccine. 

All other vaccines may be administered before, after, or at the same time as any other COVID-19 vaccines. 

 

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