Home / Ask The Experts / Several doses (antigen and diluent) of RZV (Shingrix) were mistakenly stored in our office freezer. One of these doses was administered to a patient. Is this dose valid and if not, when can it be repeated?

Administering Vaccines
Vaccine Administration Errors

Several doses (antigen and diluent) of RZV (Shingrix) were mistakenly stored in our office freezer. One of these doses was administered to a patient. Is this dose valid and if not, when can it be repeated?

Any RZV, either antigen or diluent, that is exposed to freezing temperature should not be used. If a dose exposed to freezing temperature is given to a patient the dose should be considered invalid and should be repeated 4 weeks after the invalid dose.

Last reviewed: December 28, 2022

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This page was updated on June 19, 2023.