BLOOD CLOT UNDER HIS ARM ABOUT THE SIZE OF A SMALL CAPSULE; LARGE SWELLING AND EXTREMELY PAINFUL, THE SWELLING WAS FILLED WITH PUS AND BLOOD AND AFTER BEING LANCED, HOT COMPRESS AND A FEVER, IT HAD BURST AND DRAINED/ANOTHER INFECTION THAT STARTED AND BECAME JUST AS LARGE LIKE AN ORANGE BUT IT WAS SEPARATE FRO; This spontaneous report received from a patient via a company representative concerned a male of unspecified age, race and ethnic origin. The patient's height, and weight were not reported. No past medical history or concurrent conditions were reported. The patient received covid-19 vaccine ad26.cov2.s (suspension for injection, route of admin, and batch number were not reported, expiry date: unknown) dose, start therapy date were not reported, 1 total was administered at right arm for prophylactic vaccination. The batch number was not reported and has been requested. No concomitant medications were reported.  On an unspecified date, Patient stated that he received the shot just before the pause on janssen and janssen vaccine. The patient experienced two blood infection under his right arm where he received the shot. The infections had resulted in large swelling about the size of an orange, and extremely painful. The swelling was filled with pus and blood and after being lanced, hot compress, and a fever, it had burst and drained, but the sack it was in still remains. Then patient found a blood clot under his arm about the size of a small capsule. Then about two days later there was another infection that started and became just as large like an orange but it was separate from the first one. Patient was then given an antibiotic and after lancing it, it went away after it drained, but at the time of reporting he had left with two empty sacks under his arm where the infection was. Patient was not aware of the possible side effects. Patient stated that he knowns at some point that he was going to have two empty sacks under his arm and what's left was the blood clot removed and he also stated that this facility would not do it and he would have to pay to have it done. Patient stated that when he leaves, he will give notice of a possible case action suit against janssen and janssen for the adverse side effects and the failure to provide side effects reporting information. The action taken with covid-19 vaccine ad26.cov2.s was not applicable. The patient had not recovered from large swelling and extremely painful, the swelling was filled with pus and blood and after being lanced, hot compress and a fever, it had burst and drained/another infection that started and became just as large like an orange but it was separate from the first one, and blood clot under his arm about the size of a small capsule. This report was serious (Other Medically Important Condition). This case, from the same reporter is linked to 20220421120.; Sender's Comments: V0: 20220421592-COVID-19 VACCINE Ad26.COV2.S-  Blood clot under his arm about the size of a small capsule, Large swelling and extremely painful, the swelling was filled with pus and blood and after being lanced, hot compress and a fever, it had burst and drained/another infection that started and became just as large like an orange but it was separate from the first one. 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.