Positive covid-19 result; Difficulty breathing; Felt congested / head congestion stuff; Feeling a little puny/ Head felt spacy; Hot and cold; Sense of taste and smell had changes like things didn't taste or smell right; Smell had changes like things didn't taste or smell right; Night sweats; Sore arm; Drained; This spontaneous case was reported by a consumer and describes the occurrence of COVID-19 (Positive covid-19 result), DYSPNOEA (Difficulty breathing), NASAL CONGESTION (Felt congested / head congestion stuff), FEELING ABNORMAL (Feeling a little puny/ Head felt spacy) and FEELING OF BODY TEMPERATURE CHANGE (Hot and cold) in a 26-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 29-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced COVID-19 (Positive covid-19 result), DYSPNOEA (Difficulty breathing), NASAL CONGESTION (Felt congested / head congestion stuff), FEELING OF BODY TEMPERATURE CHANGE (Hot and cold), TASTE DISORDER (Sense of taste and smell had changes like things didn't taste or smell right), PAROSMIA (Smell had changes like things didn't taste or smell right), NIGHT SWEATS (Night sweats), INJECTION SITE PAIN (Sore arm) and FATIGUE (Drained). an unknown date, the patient experienced FEELING ABNORMAL (Feeling a little puny/ Head felt spacy). At the time of the report, COVID-19 (Positive covid-19 result) had resolved and DYSPNOEA (Difficulty breathing), NASAL CONGESTION (Felt congested / head congestion stuff), FEELING ABNORMAL (Feeling a little puny/ Head felt spacy), FEELING OF BODY TEMPERATURE CHANGE (Hot and cold), TASTE DISORDER (Sense of taste and smell had changes like things didn't taste or smell right), PAROSMIA (Smell had changes like things didn't taste or smell right), NIGHT SWEATS (Night sweats), INJECTION SITE PAIN (Sore arm) and FATIGUE (Drained) was resolving.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 03-Dec-2021, SARS-CoV-2 test: positive (Positive) Positive. On 04-Dec-2021, SARS-CoV-2 test: positive (Positive) Positive. In December 2021, SARS-CoV-2 test: negative (Negative) Negative.         No concomitant medications were provided. No treatment medications were reported. Patient received her booster dose of the Moderna covid-19 vaccine by intramuscular injection on 29NOV2021 (lot number and expiration date unknown). She then went to a concert after receiving the vaccine and 2 days later she started feeling a little puny. She felt congested, hot and cold, he head felt spacy, she was drained, she had difficulty breathing, had head congestion stuff, and her sense of taste and smell had changes like things didn't taste or smell right. She also had a sore arm and night sweats. Her symptoms gradually got worse, and on the following Friday she took a rapid covid-19 test resulting in a positive covid-19 result. She then went to a clinic the next day and received an additional test showing a second positive result. 10 days later her symptoms started to resolve and she received a 3rd test which was negative. Unknown medications or treatments.  Company comment: This case concerns a 26-year-old female patient, with no reported medical history, who experienced the non-serious, unexpected AESI event of Covid-19, 4 days after patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine). The patient went to a concert after receiving the vaccine and 2 days later started to have symptoms. Patient felt congested, hot and cold, head felt spacy, she was drained, had difficulty breathing, sense of taste and smell had changes in smell and taste. Her symptoms worsened and took a rapid Covid test which turned positive 4 days after the vaccine, she then went to a clinic and had a second positive Covid-19 test 5 days after the vaccine. Her symptoms started to get better after 10 days and had a negative test result. The patient's exposure in a concert may have increased her risk of getting infected with Covid-19. The event Covid-19 remains as a confounder to the other events.  The benefit-risk relationship of mRNA 1273 vaccine is not affected by this report.; Sender's Comments: This case concerns a 26-year-old female patient, with no reported medical history, who experienced the non-serious, unexpected AESI event of Covid-19, 4 days after patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine). The patient went to a concert after receiving the vaccine and 2 days later started to have symptoms. Patient felt congested, hot and cold, head felt spacy, she was drained, had difficulty breathing, sense of taste and smell had changes in smell and taste. Her symptoms worsened and took a rapid Covid test which turned positive 4 days after the vaccine, she then went to a clinic and had a second positive Covid-19 test 5 days after the vaccine. Her symptoms started to get better after 10 days and had a negative test result. The patient's exposure in a concert may have increased her risk of getting infected with Covid-19. The event Covid-19 remains as a confounder to the other events.  The benefit-risk relationship of mRNA 1273 vaccine is not affected by this report.