which turned out to be symptoms of a transient ischemic attack, of which he had 2; This spontaneous case was reported by a consumer and describes the occurrence of TRANSIENT ISCHAEMIC ATTACK (which turned out to be symptoms of a transient ischemic attack, of which he had 2) in a 50-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     No Medical History information was reported.   On 23-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 20-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 25-Oct-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 01-Dec-2021, the patient experienced TRANSIENT ISCHAEMIC ATTACK (which turned out to be symptoms of a transient ischemic attack, of which he had 2) (seriousness criterion medically significant). At the time of the report, TRANSIENT ISCHAEMIC ATTACK (which turned out to be symptoms of a transient ischemic attack, of which he had 2) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 10-Jan-2022, Magnetic resonance imaging: abnormal (abnormal) Symptoms of a transient ischemic attack, of which he had 2, & they were found via MRI on 10Jan2021..     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No concomitant drug details were reported. No treatment details were reported.  Patient reporting his experiences after receiving 2 doses (2nd dose on 20Apr2021) & a booster dose on 25Oct2021 of the Moderna Covid-19 Vaccine.  He states that the lot #s are not listed on the back of his card but are listed on the front.  Two are stickers & one is hand written & he has no idea which lot corresponds with which dose.  The lot #s are 047A21A, 025B21A, & 017F21A.  He states that on 1Dec2021 he experienced headache & blurry vision which turned out to be symptoms of a transient ischemic attack, of which he had 2, & they were found via MRI on 10Jan2021.  Company comment: This case concerns a 50-year-old male patient, with no medical history reported, who experienced the serious (medically significant) unexpected AESI of Transient ischaemic attack after the third dose of mRNA-1273. The event occurred 1 month and 6 days after as reported booster dose. The patient reported headache and blurry vision and then diagnosed him a transient ischemic attack. MRI was performed. The patient had primary mRNA-1273 vaccine serie. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.; Sender's Comments: This case concerns a 50-year-old male patient, with no medical history reported, who experienced the serious (medically significant) unexpected AESI of Transient ischaemic attack after the third dose of mRNA-1273. The event occurred 1 month and 6 days after as reported booster dose. The patient reported headache and blurry vision and then diagnosed him a transient ischemic attack. MRI was performed. The patient had primary mRNA-1273 vaccine serie. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.