Maternal exposure during pregnancy; stuck in my chest and it sucks; COVID-19 virus test positive; This spontaneous prospective pregnancy case was reported by a consumer and describes the occurrence of CHEST DISCOMFORT (stuck in my chest and it sucks), SARS-COV-2 TEST POSITIVE (COVID-19 virus test positive) and MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy) in a 48-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 939903, 021B21A and 036A21A) for COVID-19 vaccination.     Concomitant products included ETONOGESTREL (NEXPLANON) for Contraceptive implant, AMFETAMINE ASPARTATE, AMFETAMINE SULFATE, DEXAMFETAMINE SACCHARATE, DEXAMFETAMINE SULFATE (ADDERALL) and METFORMIN for an unknown indication.   On 06-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 03-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 24-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. Last menstrual period and estimated date of delivery were not provided. On 25-Nov-2021, the patient experienced SARS-COV-2 TEST POSITIVE (COVID-19 virus test positive). On 02-Dec-2021, the patient experienced CHEST DISCOMFORT (stuck in my chest and it sucks). On an unknown date, the patient experienced MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy). The patient was treated with DEXTROMETHORPHAN HYDROBROMIDE, GUAIFENESIN, PARACETAMOL, PSEUDOEPHEDRINE HYDROCHLORIDE (DAYQUIL) for Adverse event, at an unspecified dose and frequency and GUAIFENESIN, PARACETAMOL, PHENYLEPHRINE HYDROCHLORIDE (MUCINEX SINUS MAX PRESSURE & PAIN) for Adverse event, at an unspecified dose and frequency. At the time of the report, CHEST DISCOMFORT (stuck in my chest and it sucks), SARS-COV-2 TEST POSITIVE (COVID-19 virus test positive) and MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 25-Nov-2021, SARS-CoV-2 test: positive (Positive) Positive.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Other treatment drug included: Monoclonal antibody treatment on 29-Nov-2021. Doctor called in a prescription for steroids on 02-Dec-2021, included prednisone 12-day regimen.  Company comment: This is a case of Maternal Exposure during Pregnancy that concerns a 48-year-old female patient (unknown gestation) with no medical history, who experienced the unexpected AESI of COVID-19 virus test positive on 25-Nov-2021 a day after receiving the booster dose ofmRNA-1273 vaccine and unexpected nonserious event of chest discomfort. The patient received Monoclonal antibody treatment on 29Nov2021. The rechallenge is not applicable due to the nature of the events. The benefit-risk relationship of mRNA-1273 Vaccine in not affected by this report.; Sender's Comments: This is a case of Maternal Exposure during Pregnancy that concerns a 48-year-old female patient (unknown gestation) with no medical history, who experienced the unexpected AESI of COVID-19 virus test positive on 25-Nov-2021 a day after receiving the booster dose ofmRNA-1273 vaccine and unexpected nonserious event of chest discomfort. The patient received Monoclonal antibody treatment on 29Nov2021. The rechallenge is not applicable due to the nature of the events. The benefit-risk relationship of mRNA-1273 Vaccine in not affected by this report.