all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer; all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer; I lost my sense of taste. Okay, not smell but taste; This spontaneous case was reported by a patient and describes the occurrence of AGEUSIA (I lost my sense of taste. Okay, not smell but taste), INTERCHANGE OF VACCINE PRODUCTS (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer) and COVID-19 IMMUNISATION (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer) in an elderly patient of an unknown gender who received mRNA-1273 (Spikevax) for COVID-19 prophylaxis.     Concurrent medical conditions included Hearing loss.    On an unknown date, the patient received dose of mRNA-1273 (Spikevax) (unknown route) 1 dosage form. In 2022, the patient experienced AGEUSIA (I lost my sense of taste. Okay, not smell but taste). On an unknown date, the patient experienced INTERCHANGE OF VACCINE PRODUCTS (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer) and COVID-19 IMMUNISATION (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer). At the time of the report, AGEUSIA (I lost my sense of taste. Okay, not smell but taste) had not resolved and INTERCHANGE OF VACCINE PRODUCTS (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer) and COVID-19 IMMUNISATION (all the time I had Moderna (Unspecified Shot) but the last one was Pfizer; I got the booster shot (Unspecified Booster shot) last month; I got from Pfizer) had resolved.            No concomitant information was reported. Patient stated When again probed to clarify contact no: Patient stated patient getting confused, had to go through cell phone . Patient stated this was not anything serious. It has nothing to do with Pfizer because all the time patient had Moderna (Unspecified Shot) but the last one was Pfizer (Unspecified Booster Shot). Patient had no absolutely no reaction for the very beginning with the vaccine nothing what so ever, never got sick, never had one symptom but in the past let's just say past 6, 8, 9, 10 months, patient lost my sense of taste not smell but taste. Patient went to the doctor, Doctor said well you have probably had a mild case and it did not leave any reaction so, Doctor thinks that patient had a mild reaction to it but it did not two years ago, it's only just 6,8,9 months or something, where patient lost sense of taste. Patient was 93 years old  but this is being going on since last year so, this is why patient was calling.  No treatment information was reported. Company Comment: This is a spontaneous case concerning an elderly patient (around 93 years old) of an unknown gender with no relevant medical history, who experienced the non-serious unexpected, AESI event of AGEUSIA which occurred on an unknown date after an unknown dose of mRNA-1273 vaccine. Additionally, Interchange of vaccine products and revaccination with different COVID-19 vaccine was noted (patient received Pfizer vaccine as booster dose). Patient had no reaction at the very beginning with the vaccine, never got sick, never had one symptom, but in the past 6, 8, 9, 10 months, patient lost sense of taste. Patient went to the doctor, which said patient could have probably had a mild case and it did not leave any reaction. The outcome of the event was reported as not recovered. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.   Reporter did not allow further contact