still could not walk/ he could literally not walk; he couldn't get out of bed or stand up; This is a spontaneous report from a contactable consumer (patient's sister).  A male patient of an unspecified age received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number and expiration date not reported), via an unspecified route of administration on 09Apr2021 as first dose at a single dose for COVID-19 immunization. Medical history included dementia,  rehabilitation therapy (rehab) from 01May2021, hospitalized for Covid from 05Jan2021, received convalescent plasma on 09Jan2021, collapsed, seizures, tremors, and tardive dyskinesia. Concomitant medications included valproic acid for seizures and quetiapine fumarate (SEROQUEL). The patient's sister reported that her brother was hospitalized for COVID on 05Jan2021. He received convalescent plasma on 09Jan2021 and was discharged from the hospital 2 weeks later. 5 days after he was discharged, he collapsed and started having seizures and was admitted to the hospital on 19Jan2021. He tested positive again for COVID after testing negative 2 times prior. He was in the hospital for seizures for 3 weeks and was discharged back to his adult facility. He was taking valproic acid for seizures and then developed tremors and was also on Seroquel "for a long time". He was diagnosed with tardive dyskinesia, which included tremors of his jaw hands and legs trembling. The reporter then stated that he was given the first Pfizer Covid vaccine dose on 09Apr2021. On 10Apr2021, the reporter was told by his facility that he couldn't get out of bed or stand up. By 12Apr2021 he wasn't any better and still could not walk. He was admitted back into the hospital on 12Apr2021 and was discharged on 10May2021. He did not get his second dose of the vaccine. It has now been over 6 weeks and she wanted to know if there is any guidance on getting the vaccine this late. She said that she called regarding the Pfizer COVID vaccine and has a general question. For someone who got the first vaccine, she knows what the normal wait time for the second dose, but wanted to know what is the maximum wait time for the second dose. She is trying to help her brother and this is serious. She needs to make an educated decision whether her brother should get the second dose tomorrow or not. He was in rehab and has had COVID. He did contract COVID and had convalescent plasma treatment on 09Jan2021 and received the first dose on 09Apr2021, exactly 90 days after. In the interim, he developed seizures from COVID and tremors from the seizure medication. The day after the vaccine, on 11Apr2021, he could literally not walk. He was in the hospital for almost 3 weeks and missed the second dose. He has been in rehab since 01May2021 and were offering the second vaccine tomorrow. She asked if 7 weeks would be safer. She stated that she is his health care proxy, is very involved and he has dementia as well. She stated that she has provided her contact information to someone and has been on the phone going on a half hour. She really needs to keep moving to get advice from people and has not been helping at all. She explained the whole situation and was being transferred but the call disconnected. She is very happy to report but this is not the time. She would like educated information on whether or not he should get the second vaccine or not. She was told by her pharmacist that with Moderna, can go up to 90 days after the first dose. She needs a general statement if it is up to 6 weeks. It has been 6 and a half. The outcome of the events was unknown.  Information about lot/batch number has been requested.