Acute respiratory failure with hypoxia; Acute respiratory failure with hypoxia; Couldn't breathe; Pneumonia due to MRSA/Ground glass pneumonia; weak; lost 20 pounds; fever; Cough; This is a spontaneous report from a contactable consumer (the patient himself). A 64-year-old male patient received the second dose of BNT162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Lot number EN6208, Exp 30Jun2021) via an unspecified route of administration in arm left on 16Apr2021 11:00AM (at the age of 64-year-old) at single dose for COVID-19 immunisation. Relevant medical history included heart disease ongoing from 1997 (this happened in 1997 and the patient had been living with it for a little while), heart attack, pacemaker defibrillator because of cardiac arrest (in 2011), atrial fibrillation (diagnosed a little while, he was not sure and had been in and out of the hospital and to heart doctor quite a bit) and hypertension. The patient was administered with first shot of BNT162b2 (Lot number EW0153) in left shoulder on 16Mar2021 11:00AM (at the age of 64-year-old). Concomitant medications were not reported. On 16Apr2021 after the second dose, the patient was fine. There were no reactions after the first dose, but the second dose two days after he started developing a cough and fever. He thought it was a side effect but then ended up in the ER with pneumonia. They gave him antibiotics and sent him home. He went through the antibiotics and went back because he was still sick and not responding. They gave him more antibiotics and sent him home. He went through that batch and ended up really bad so he had to call an ambulance a few weeks later. He was diagnosed with MRSA Pneumonia and stayed in the hospital for 5 days. Then, he was discharged. He went back to the ER again a few days later because he did not seem to be improving.  He was coughing and was weak. He was given another batch of antibiotics. He did not know if it was from the shot or what - he was healthy until then. The patient added that she lost 20 pounds and confirmed that it was following the vaccine. Two days after the vaccine, maybe it was 19Apr2021, he had a fever and it was now gone (exact dates were unknown). Cough happened at the same time of the fever but it was not as bad, and then progressively got worse. His lungs started filling up. They thought it was COVID. by the x-rays it looked like COVID lung but they took a sample and it was MRSA (exact dates were unknown). His admission was 18May2021 and was for acute respiratory failure with hypoxia. Discharge paperwork said acute chronic combined systolic diastolic congestive heart failure but he has had that for many years.  It also stated primary hypertension but he has had that. The paperwork sayid pneumonia due to MRSA and pneumonia due to unspecified organism. He was hospitalized 18May2021 through 23May2021 with pneumonia and the reason he was hospitalized was because he could not breathe. Lost 20 pounds: after he started getting sick from the beginning of it all, he was coughing and losing weight and all that.  It may not be quite 20 pounds, maybe 17, but he just knew that he was down quite a bit. He was 160s now, he was high 170s before (as reported). Treatment included Lasix and all kinds of different antibiotics. They were giving him, he did not know what it was, at first. Then, they narrowed it down and once they found out it was MRSA they gave him Clindamycin he believes. Investigations: they did CT scans, chest X-rays, and labs but he does not know any information. Each time they did a chest x-ray, when he went to get a chest x-ray, each one was worse all the way up to when he was admitted. When he went, they did a bronchial scope or whatever, he was not sure, and they saw lots of swelling and infiltrate. He did not know what this meant, stuff was infiltrating into the tissue and it was not just in the airways. He added it looked like ground glass pneumonia is what they said. The patient added that he was usually pretty active and cannot do anything anymore. He had three or four Covid tests, all negative, no additional details provided. Outcome of the events was unknown.  Follow-up attempts are needed. Further information is expected.