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Report #2889386

Received Mar 17, 2026

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex
Female
Age
Age unknown
State
—
Recovered
Unknown
Vaccinated
Mar 3, 2026
Onset
Mar 3, 2026
Days to onset
0
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
HPV9HPV (GARDASIL 9)MERCK & CO. INC.UNK—OT

Symptoms (3)

Exposure during pregnancyProduct use issueWrong product administered

Symptom narrative

she is 28 weeks pregnant; No symptoms or side effects reported by patient./No additional AE; she accidentally received a GARDASIL 9 vaccine on 03/03/2026. Patient reported that she was supposed to receive a "TDAP" vaccine; This spontaneous report was received from a pregnant female patient of unknown age and referred to herself. The patient's concurrent condition included immunocompromised. The patient's medical history, past medications and concomitant medications were not reported. On 03-Mar-2026, at the gestational age of 28 weeks (last menstrual period [LMP]: 20-Aug-2025 [not reported but manually calculated], estimated conception date: 03 Sep 2025 and pregnancy due date: 27 May 2026 [calculated with date of LMP]), the patient was accidentally vaccinated by a medical assistant with Human Papillomavirus 9-valent Vaccine, Recombinant (GARDASIL 9) (0.50 mL) (total) (lot#, expiration date, route of administration, anatomical site and dose number in series were not reported) as prophylaxis (Exposure during pregnancy); she was supposed to receive Diphtheria vaccine toxoid (+) Pertussis vaccine acellular (+) Tetanus vaccine toxoid (TDAP) (Wrong product administered). No information was provided to the patient as to why the Medical Assistant mistakenly administered Human Papillomavirus 9-valent Vaccine, Recombinant (GARDASIL 9) to her instead of the Diphtheria vaccine toxoid (+) Pertussis vaccine acellular (+) Tetanus vaccine toxoid (TDAP). No symptoms or side effects reported by patient, no additional adverse event (AE) (No adverse event). Pregnancy outcome and fetal outcome were unknown. Batch/Lot number is being requested and will be submitted if received.

Current illness

Immunocompromised