Effect of infLuenza vaccInation After Myocardial INfArction on Cardiac inflammaTory responsE

Inclusion Criteria: * Patients with a diagnosis of non-ST-segment elevation myocardial infarction * A finalized coronary PCI * Male or non-fertile female subjects ≥18 years. (Females without childbearing potential, postmenopausal women and women with a history of hysterectomy or other medical conditions that preclude pregnancy) * Written informed consent * A CCTA can be scheduled within 7 days after PCI Exclusion Criteria: * Has received influenza vaccination within 6 months * Other vaccination planned within 8 weeks (including covid-19 booster doses) * Severe allergy to eggs or previous allergic reaction to influenza vaccine * Cardiac surgery or staged PCI planned within 8 weeks * Coronary stent involving the proximal RCA * Suspicion of febrile illness or acute, ongoing infection * Hypersensitivity to the active substances or ingredients of Vaxigrip or against any residues, such as eggs (ovalbumin or chicken proteins), neomycin, formaldehyde and octoxinol * Subjects with endogenic or iatrogenic immunosuppression that may result in reduced immunization response * Inability to provide informed consent * Previous randomization in the ELIMINATE trial * Any non-cardiovascular condition, e.g. malignancy, with a life expectancy of less than 1 year based on the investigator´s clinical judgement. * Contraindication to coronary CT angiography (e.g., inability to lie flat, contraindication to glyceryl trinitrate, previous contrast allergy or contrast-induced nephropathy, severe renal impairment \[eGFR \<30 mL/min/1.73 m2\]) * Atrial fibrillation * Uncontrolled chronic inflammatory disease * Unable to comply with protocol requirements