blood pressure became very low; experienced cellulitis in her legs; Diagnosed with COVID a week later; she couldn't even remember anybody; acute Alzheimers; had mild dementia but towards the end it seemed to have exacerbated; This spontaneous case was reported by a consumer and describes the occurrence of DEMENTIA ALZHEIMER'S TYPE (acute Alzheimers), DEMENTIA (had mild dementia but towards the end it seemed to have exacerbated), HYPOTENSION (blood pressure became very low) and CELLULITIS (experienced cellulitis in her legs) in a 91-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.     Concurrent medical conditions included Dementia.   In February 2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. In February 2021, received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced DEMENTIA ALZHEIMER'S TYPE (acute Alzheimers) (seriousness criteria death and medically significant), DEMENTIA (had mild dementia but towards the end it seemed to have exacerbated) (seriousness criterion medically significant), HYPOTENSION (blood pressure became very low) (seriousness criterion hospitalization), CELLULITIS (experienced cellulitis in her legs) (seriousness criterion medically significant), COVID-19 (Diagnosed with COVID a week later) and MEMORY IMPAIRMENT (she couldn't even remember anybody). The patient died on an unknown date. The reported cause of death was death was acute alzheimers. It is unknown if an autopsy was performed. At the time of death, DEMENTIA (had mild dementia but towards the end it seemed to have exacerbated), CELLULITIS (experienced cellulitis in her legs), COVID-19 (Diagnosed with COVID a week later) and MEMORY IMPAIRMENT (she couldn't even remember anybody) outcome was unknown and HYPOTENSION (blood pressure became very low) had resolved.            Treatment included unspecified pressors. No concomitant medications were reported. Patient received the 1st dose of the Moderna COVID-19 vaccine in FEB-2021. Caller did not know the exact dates of administration of the two doses. Patient was then diagnosed with COVID a week later. Patient did not have much of a reaction to the 1st dose or any symptoms from COVID. She then received her 2nd dose of the Moderna COVID-19 vaccine in middle of FEB-2021, per the caller. In the end of APR-2021 or beginning of MAY-2021, patient experienced cellulitis in her legs. Her blood pressure became very low and she was hospitalized for treatment. She was put on pressors. She recovered from it and was sent back to her assisted living facility. However, on 25-MAY-2021, she passed away at the assisted living due to acute Alzheimers. Patient had mild dementia but towards the end it seemed to have exacerbated, where she couldn't even remember anybody. Her diagnosis at the time of death was acute Alzheimers.   This case was linked to MOD-2021-034532 (Patient Link).; Sender's Comments: This is a 91-year-old female patient who received mRNA-1273 (COVID 19 Vaccine Moderna) (batch unknown) who experienced exacerbation of her DEMENTIA, ALZHEIMER'S DEMENTIA, HYPOTENSION and CELLULITIS after her second dose of vaccine, leading to her death from ACUTE ALZHEIMERS.  Advanced senior age also could be attributed to the development of the events. It is unlikely, that the events are related to the vaccine based on long standing illness of DEMENTIA. . Very limited information has been reported at this time. Further information is expected.; Reported Cause(s) of Death: death was acute Alzheimers