Received Feb 27, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| TDAP | TDAP (BOOSTRIX) | GLAXOSMITHKLINE BIOLOGICALS | UNK | 37R35 | — |
Maladministration Boostrix instead of Infanrix; This non-serious case was reported by a nurse via call center representative and described the occurrence of wrong vaccine administered in a 3-year-old male patient who received DTPa (Reduced antigen) (Boostrix) (batch number 37R35, expiry date 21-OCT-2027) for prophylaxis. Co-suspect products included DTPa (Infanrix) for prophylaxis. Previously administered products included Vaxelis (received the previous doses of VAXELIS series). On 19-FEB-2026, the patient received Boostrix. The patient did not receive Infanrix. On 19-FEB-2026, an unknown time after receiving Boostrix, the patient experienced wrong vaccine administered (Verbatim: Maladministration Boostrix instead of Infanrix). The outcome of the wrong vaccine administered was not applicable. This report is made by GSK without prejudice and does not imply any admission or liability for the incident or its consequences. Additional Information: GSK Receipt Date: 19-FEB-2026 The batch number was not provided and a request for this information has been made.