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Co-administration, dose-interval and interchangeability

Is there a minimum and maximum time interval between COVID-19 vaccine doses?

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3/17/2023

For timely protection, it is best to get vaccine doses within the recommended time interval. WHO recommends an interval of 8 to 12 weeks between the primary vaccination doses.

There is no maximum limit to receive the second or subsequent doses; it is never too late to get the missed dose if a delay cannot be avoided. The minimum recommended interval between doses should not be reduced because it is important to allow sufficient time for the immune system to mount a response.

Update (March 2023):

As a general principle, an interval of 4–6 months between completion of a primary series and administration of a first booster dose, and between booster doses. could be considered.

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