Drug ineffective; Completely asymptomatic; Exposed to unvaccinated patient with COVID-19; Received second dose of Moderna vaccine while pregnant; Headache; Sneezing; Back ache; This spontaneous prospective pregnancy case was reported by a nurse and describes the occurrence of SNEEZING (Sneezing), BACK PAIN (Back ache), DRUG INEFFECTIVE (Drug ineffective), ASYMPTOMATIC COVID-19 (Completely asymptomatic) and OCCUPATIONAL EXPOSURE TO SARS-COV-2 (Exposed to unvaccinated patient with COVID-19) in a 30-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 025J20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Pregnant. Concomitant products included MINERALS NOS, VITAMINS NOS (PRENATAL VITAMINS [MINERALS NOS;VITAMINS NOS]) for an unknown indication.   On 04-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 01-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. The patient's last menstrual period was on 22-Dec-2020 and the estimated date of delivery was 26-Sep-2021. On 01-Feb-2021, the patient experienced EXPOSURE DURING PREGNANCY (Received second dose of Moderna vaccine while pregnant). On 30-Jul-2021, the patient experienced ASYMPTOMATIC COVID-19 (Completely asymptomatic) and OCCUPATIONAL EXPOSURE TO SARS-COV-2 (Exposed to unvaccinated patient with COVID-19). On an unknown date, the patient experienced SNEEZING (Sneezing), BACK PAIN (Back ache), DRUG INEFFECTIVE (Drug ineffective) and HEADACHE (Headache). The patient received mRNA-1273 (Moderna COVID-19 Vaccine) beginning around the  fifth week of the pregnancy.  At the time of the report, SNEEZING (Sneezing), BACK PAIN (Back ache), ASYMPTOMATIC COVID-19 (Completely asymptomatic) and HEADACHE (Headache) outcome was unknown and DRUG INEFFECTIVE (Drug ineffective), OCCUPATIONAL EXPOSURE TO SARS-COV-2 (Exposed to unvaccinated patient with COVID-19) and EXPOSURE DURING PREGNANCY (Received second dose of Moderna vaccine while pregnant) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 30-Jul-2021, Polymerase chain reaction: positive (Positive) The PCR test results came back positive for COVID-19. On 30-Jul-2021, SARS-CoV-2 test: positive (Positive) subsequently tested positive after exposure to partner, who also tested positive for COVID-19 by PCR. On 06-Aug-2021, Polymerase chain reaction: negative (Negative) Negative-not detected.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No treatment information was provided. The patient was in her third trimester. The patient was indirectly exposed to a patient who had not been vaccinated on Friday, 30-Jul-2021, at her place of employment and was swabbed the same day. The patient was currently in isolation. The patient was 32 weeks pregnant when she tested positive.  This is a case of lack of effect in the patient diagnosed with COVID-19  approximately 6 months after 2 doses of Moderna vaccine. there were other events reported.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.   This case was linked to MOD-2021-273725 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 17-Aug-2021: Added lab data, added new events of headache, back ache and sneezing and updated gestation period; Sender's Comments: This is a case of lack of effect in the patient diagnosed with COVID-19  approximately 6 months after 2 doses of Moderna vaccine. there were other events reported.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.