BLADDER ISSUES; SUSPECTED COVID-19 INFECTION; DEMENTIA; This spontaneous report received from a consumer via a company representative via social media concerned a male of unspecified age, race and ethnicity. The patient's weight, height, and medical history were not reported. The patient previously received covid-19 vaccine ad26.cov2.s (unspecified manufacturer) (Dose number in series 1) (suspension for injection, route of admin, and batch number were not reported, expiry: unknown) dose was not reported, 1 total, start therapy date were not reported for covid-19 prophylaxis. It was unknown whether patient had any adverse events following the vaccination with first dose of covid-19 vaccine ad26.cov2.s (Dose number in series 1). The patient received covid-19 vaccine ad26.cov2.s (Dose number in series 2) (suspension for injection, route of admin, and batch number were not reported, expiry: unknown) dose was not reported, 1 total, start therapy date were not reported for covid-19 prophylaxis. The batch number was not reported. Per procedure, no follow-up will be requested for this case. No concomitant medications were reported.  On an unspecified date, the patient had a light case of covid (suspected covid-19) right after the vaccine (Dose number in series 2). Then in rapid succession everything just started not working with patient's body. Something serious with patient's bladder (bladder issues) he was in for almost a month with, ended up hospitalized several times for that and they were baffled by it and then patient was hospitalized in and out for almost an entire year with one thing after another which had not bothered him before (Dose number in series 2). The doctors did not know what to do and leaned toward patient being in the 1 percent who reacted badly to vaccine. Just too many things were going haywire and not much was helping. On an unspecified date, patient was sent home and then patient started doing crazy things and wandering off. Had to have someone with patient at all times. On an unspecified date, patient had final diagnosis of dementia (Dose number in series 2). The number of days of hospitalization was not reported. As per reporter "he had a light case of covid right after the vaccine. Then in rapid succession everything just started not working with his body. Something serious with his bladder he was in for almost a month with, ended up hospitalized several times for that and they were baffled by it, and then he was hospitalized in and out for almost an entire year with one thing after another which had not bothered him before. The doctors did not know what to do and leaned toward him being in the 1 percent who react badly to vaccine. Just too many things were going haywire and not much was helping. They sent him home and then he started doing crazy things and wandering off. Had to have someone with him at all times. My sister had to take him before a judge to get him put in a home to care for him. Final diagnosis now is Dementia. He had the vaccines, got sick and never got well. Just deteriorated. Some of the things my sister mentioned were exactly what I experienced when I was very ill with COVID and many of the after-effects I still have. covid-fog, confused, headaches, totally exhausted al the time, hallucinations. Only he just went waaaay down and did not come back". The action taken with covid-19 vaccine ad26.cov2.s was not applicable. The patient had not recovered from bladder issues, dementia, and suspected covid-19 infection. This report was serious (Hospitalization Caused / Prolonged, and Other Medically Important Condition). This case, from the same reporter is linked to 20221003775, 20220949079 and 20220949071.; Sender's Comments: V0: 20221005834-COVID-19 VACCINE AD26.COV2.S- Dementia, Bladder issues. The event(s) has a unknown/unclear temporal relationship, is unlabeled, and has unknown scientific plausibility. There is no information on any other factors potentially associated with the event(s). Therefore, this event(s) is considered unassessable.