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Vaccine database1/4/2024 ![]() Children who received an incorrect dose of a COVID-19 vaccine or who received an inappropriately prepared vaccine have only reported expected adverse events like a sore arm, headache, and fever. Immunization errors have been reported with Pfizer-BioNTech, Moderna, AstraZeneca, Janssen, Sinovac, Novavax and other COVID-19 vaccines.Īlthough in very rare instances serious adverse events have been documented after immunization against COVID-19 disease, none of these were verified to be related to immunization errors of any kind. ![]() The types of immunization errors include the use of adult dose in children, use in inappropriate age groups, underdose, overdose, use of unapproved COVID-19 vaccines, inappropriate scheduling between doses, preparation errors such as omitting a diluent before immunization, administering a COVID-19 vaccine instead of another vaccine, failure to adhere to requisite storage conditions and use of expired doses. The Australian Therapeutic Goods Administration (TGA) also reported instances of immunization errors among 5–11-year-olds and made recommendations to reinforce the use of the paediatric version of the Comirnaty (Pfizer) vaccine which comes in a vial with an orange top (2).Īccording to the WHO global database of individual case safety reports (VigiBase data as of 10 July 2022), about 24% of all case safety reports in children after COVID-19 immunizations are related to immunization errors. On, the US Advisory Committee on Immunization Practices (ACIP) presented data showing that half of all non-serious adverse events following Pfizer BNT162b2 immunization in children aged 5-11 years submitted to the Vaccine Adverse Event Reporting System (VAERS) surveillance system through 24 April 2022 included an event associated with immunization error (1). The immunization errors have been reported through the passive vaccine safety surveillance systems and included in the media in a number of countries. WHO is aware of an increasing number of reports regarding COVID-19 immunization errors in children.
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