Study to Evaluate Safety, Efficacy and Immunogenicity of Acne mRNA Vaccine in Participants With Mild Acne

Inclusion Criteria:

* Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, and laboratory tests as judged by the investigator
* Clinical diagnosis of mild facial acne vulgaris with:

  * IGA score of mild (grade 2 on the 5-grade IGA scale) AND
  * between 10 to 24 non-inflammatory lesions (ie, open and closed comedones) AND
  * between 5 to 19 inflammatory lesions (ie, papules and pustules) AND
  * no nodulocystic lesions (ie, nodules and cysts)

Exclusion Criteria:

Participants are excluded from the study if any of the following criteria apply:

* Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within 6 months prior to the first study intervention administration; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
* Known systemic hypersensitivity to any of the study intervention components; history of a life-threatening reaction to the study interventions used in the study or to a product containing any of the same substances; any allergic reaction (eg, anaphylaxis) after administration of mRNA coronavirus disease 2019 (COVID 19) vaccine
* Previous history of or undergoing (suspected or confirmed) myocarditis and/or pericarditis and/or myopericarditis
* Skin pathology or condition that, in the investigator's opinion, could interfere with the evaluation of the study intervention or requires use of interfering topical, systemic, or surgical therapy
* Excessive facial hair, facial tattoos, facial skin disorders, skin reactions that may interfere with the study assessments in the investigator's opinion (including - but not limited to - actinic keratosis, eczema, psoriasis, seborrheic dermatitis, rosacea, acute or recent sunburn) or skin infection
* Receipt of immune globulins, blood or blood-derived products in the past 3 months
* Self-reported or documented seropositivity for human immunodeficiency virus (HIV), hepatitis B virus, or hepatitis C virus

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.