On Wednesday, August 25th, 2021 my mother awoke and assumed her normal daily routine. She had a breakfast of one egg, two slices of bacon and wheat toast. She was perfectly ambulatory and needed no help in walking, dressing, her personal hygiene or assistance in going to the restroom. At 12:30 that afternoon she walked down the stairs of her home and she and I left for her COVID vaccination at the local store. We arrived at store and immediately went to the pharmacy department where she received the Moderna vaccination.  We continued shopping for grocery items for an additional 15-20 minutes, paid our bill and exited the store. As we were leaving the store she complained of soreness in her vaccinated arm and a feeling of weakness. I had to help her into our vehicle and upon arriving home had to physically carry her up the steps and into the house. I put her onto the couch where she could relax and watch television. She was alert and mentally clear but extremely weak. I researched reactions to the vaccination on line and attributed her initial weakened condition as normal reaction to the vaccination and that they could last 1-3 days with minor continuing symptoms for as long as two weeks. She continually worsened for the next three days and her mental state continually degenerated to where she seemed unaware of her surroundings and had difficulty responding to verbal stimuli. She could not walk, dress, bathe herself, lost control of her bowels and could not eat without assistance. I contacted my sister and she came over to help me care for her in regards to personal hygiene, feeding, dressing and putting her into and changing of adult diapers. After three days passed with her showing no signs of improvement, I reached out to her primary care physician and left a detailed message of her symptoms with the messaging service of what was happening and asked for advice. I was informed that it was a normal reaction to the vaccine and to monitor her for any worsening signs.     On 17 September with her health showing no signs of improving we called 911 for emergency care and had her transported to hospital. A full battery of tests were performed including a CAT scan with no indications of what was causing this digression in her health. The staff stated she was exhibiting signs of dementia which we refute. Her last complete physical dated Feb 05, 2021 indicates her mental and Neurological state at baseline and her Psychiatric state as normal. She was discharged from hospital on Sept 22, 2021 and was transported home where she remained under family care pending assistance from local elderly programs. On Sept, 29th 2021 she was reclining in her armchair when she slumped over to the side and was unresponsive. 911 was called and paramedics arrived, transported her into the emergency vehicle where she went into cardiac arrest. The emergency response team administered CPR until arrival at hospital where she was pronounced dead.       My mother went from a person able to care for herself with minimum assistance to a person who seemed to be in the last stages of Alzheimer?s disease in a matter of three weeks. She did not suffer from any of the mental or physical problems until immediately after the receiving the Moderna COVID vaccination. At 83 years of age she did have normal health issues associated with someone of her age. She was a colon cancer survivor and had been diagnosed with COPD and was on oxygen but she suffered no medical condition which would have resulted in her rapid decline and subsequent death such as happened immediately following her vaccination. Based on what I personally witnessed following her vaccination, I fully believe that if she had not taken it, that she would be with us still. There has not been enough time allowed or documentation of adverse reactions to the COVID vaccination, especially with the elderly or persons with pre-existing medical conditions.