Pneumonia after getting the COVID Vaccine; Pneumonia was related to MRSA; Very weak; mild fever; This is spontaneous report received from a contactable consumer (patient's husband). A 78-year-old female patient received bnt162b2 (BNT162B2), dose 1 via an unspecified route of administration at the age of 78-years-old, administered in arm on 25Feb2021 15:45 (Lot Number: EN6202) as single dose for COVID-19 immunization. Medical history included diabetes mellitus from 2011 (Verbatim: Diabetic; Diagnosed 10 years ago), rheumatoid arthritis from 1995 (Verbatim: Rheumatoid arthritis; Diagnosed in 1995), cardiac failure congestive from Oct2020 (Verbatim: Congestive Heart Failure), adrenal insufficiency from 1990 (Verbatim: Adrenal insufficiency; Diagnosed in probably 1990), atrial fibrillation from 2017 (Verbatim: Atrial fibrillation; Diagnosed 4 years ago). Concomitant medication included unspecified medications ("she takes lots of medications. Too long of list she probably takes 15 different medications, reporter chose not to provide them). No-other vaccines were given at the same time. She gets the flu vaccine every year, shingles vaccines, pneumonia vaccines every year but, has no idea where they were manufactured. Confirmed she did not get the listed vaccines at the same time she got the COVID Vaccine. The patient's husband and the patient (his wife) both received their 1st COVID shot on the 25Feb2021 and was scheduled for 3 weeks later. He got his COVID on the 18Mar2021. The patient got Pneumonia and was admitted to the hospital but he does not know the exact time the Pneumonia started. It developed over a period of several day started with a mild fever (in Mar2021) and after the 2nd or 3rd day her fever spiked and that's when she was admitted to the hospital. He reports his wife went into the hospital with Pneumonia on 18Mar2021, the day she was supposed to get the 2nd shot. It was also reported that Pneumonia was related to MRSA. She laid up in the hospital for 2 weeks, the weakness ("very weak") may have happened in the hospital or a few days before, date was confirmed to be on 15Mar2021. The event "pneumonia" was totally unrelated to COVID and now she is in a nursing home, she went in on 26Mar2021. She probably won't be able to have the 2nd shot for a couple of weeks. She was in there for a couple of weeks and still quarantined. He wanted to know will the fact that she is not getting the 2nd shot at the 3-week interval reduce the efficacy of the vaccine since she is getting the 2nd dose late. Does it make a difference with the effectiveness of the vaccine if she's going take the 2nd dose 3-4 weeks or even a month and a half rather than the usual 21 days interval? No treatment before going to the hospital other than calling the doctor and the doctor saying take her to the hospital (not reported if patient received treatment during hospital stay). No treatment done over the weekend, while she was in the nursing home. The adverse event pneumonia required a visit to Emergency Room. The patient was hospitalized from 18Mar2021 to 26Mar2021. Investigations included had a lot of blood work done, a CT scan, an X-ray on unspecified dates. He does not have any of the results but, the physicians have them. The outcome of the event mild fever was unknown, for very weak was not recovered while for the rest of the events was recovered on 26Mar2021.