1st dose was the Pfizer-Biontech vaccine, then I took the Moderna for the second dose, and now Pfizer covid vaccine for the booster dose; 1st dose was the Pfizer-Biontech vaccine, then I took the Moderna for the second dose, and now Pfizer covid vaccine for the booster dose; short of breath the breathing was really bad; he was itching before but the bumps started about 12 to 15 hours later after the shot, they are worse,  and are spreading all over body from toes to his head, arms, chest, everywhere; high fever started 30-45 minutes after getting the shot and for the last 2 days; itching bumps; weak; dizzy; muscle tightness; This is a spontaneous report from a contactable consumer (Patient) via Medical Information Team.  A 23-years-old male patient received bnt162b2 (COMIRNATY, Formulation: Solution for injection, Batch/Lot Number: 30155BA), dose 3 via an unspecified route of administration, administered in right arm on 11Oct2021 at 22:00 pm (at the age of 23-year-old) as dose 3 (booster), single for COVID-19 immunisation at emergency room. The patient medical history reported as none. The patient 1st dose was the historical Vaccine bnt162b2 (pfizer-biontech Covid-19 vaccine, Formulation: Solution for injection, Batch/Lot Number: EM9809), via an unspecified route of administration, administered in right arm on 03Feb2021 at 10pm (at the age of 23-year-old) as dose 1, single for covid-19 immunisation and received moderna for the second dose (MODERNA COVID-19 VACCINE, Batch/Lot Number: 30155BA), via an unspecified route of administration, administered in right arm on 26Feb2021 at 7:30am (at the age of 23-year-old) as dose 2, single for COVID-19 immunisation. The patient concomitant medication(s) included influenza vaccine (FLU) taken for an unspecified indication from 10Oct2021 to 10Oct2021. On an unspecified date, the patient received 1st dose was the Pfizer-Biontech vaccine, then he took the Moderna for the second dose, and now Pfizer covid vaccine for the booster dose. On 11Oct20211 hour after taking the vaccine, patient started to feel short of breath, he works at the hospital, so he was not worried, since he thought it was normal. he asked the doctors at the hospital, but they say they did not know" patient worried because when he took your other vaccine, he did not have these issues. Is it normal to have itchy, bumps, I ran a high fever the last 2 days, and his breathing is bad? "He has not gone to the hospital because, he thought it was normal, but the last couple of days it has gotten worse". Upon Follow up It was explained that he had his first dose with the Pfizer Covid 19 vaccine, then the second dose he got was Moderna. On 11Oct2021 he got the booster from Pfizer and after that dose was complaining of itching bumps, breathing bad, and a high fever for the last 2 days. One hour after getting he reports having difficulty breathing. Caller explains he did not go to the hospital for this as he works as a security guard in the hospital and so did not think about it, but it is starting to get worse. Caller had questions and these were addressed by the transferring agent. Caller explains he also was very weak and dizzy all through his shift after getting the dose. The caller relays he was itching before, but the bumps started about 12 to 15 hours later, after the shot. They are worse and are spreading all over body from toes to his head, arms, chest, everywhere. the breathing bad started about an hour after getting the shot and it is about the same at this point compared to when it started. high fever- this started 30-45 minutes after getting the shot and have lasted for the last 2 days, it is still ongoing. dizziness- this started 30-45 minutes after getting the shot, it was bad yesterday but today it is better, he is not quite as dizzy now. Caller also states he had muscle tightness this started 30-45 minutes after getting the shot, it was pretty bad yesterday also but today it is better. Patient did not visit Emergency Room or Physician Office for events. Treatment not received for the adverse events. Outcome of the events was not recovered for high fever, for muscle tightness it was recovering and for all other reported events it was unknown.   Follow-up attempts are completed. No further information is expected.