BLOOD CLOT; SMALL R SIDED HEART ATTACK; LUNGS FILL WITH FLUID; SUSPECTED COVID-19; This spontaneous report received from a patient via a company representative via social media concerned a patient of unspecified age, sex, race and ethnic origin. Initial information was processed with the additional information received on 21-DEC-2022. The patient's height, and weight were not reported. The patient's past medical history included: covid-19 (horrible disease but finally started doing better). The patient received covid-19 vaccine ad26.cov2.s (unspecified manufacturer) (Dose number in series 1) (suspension for injection, route of admin not reported, batch number: unknown and expiry: unknown) dose was not reported, 01 total administered on an unspecified date for covid-19 prophylaxis. The patient experienced sick for two weeks with Covid (Dose number in series 1).  The patient additionally received covid-19 vaccine ad26.cov2.s (Dose number in series 2) (suspension for injection, route of admin, batch number and expiry were not reported) dose, start therapy date were not reported, 01 total administered for covid-19 prophylaxis. The batch number was not reported. Per procedure, no follow-up will be requested for this case. No concomitant medications were reported.  On an unspecified date, the patient experienced blood clot that caused small r sided heart attack. On DEC-2022, the patient experienced suspected covid-19. The patient experienced bad chills but no temp throwing up the clear frothy phlegm urgent med gave capsule for virus and steroids. Had lasix (furosemide) at house every time lungs fill with fluid the patient would take 20 mg lasix 4 different times. No brain fog or loss of memory. The patient was sick for 3 weeks and was still lingering at the time of this report (Dose number in series 2). As per the patient, "Had Covid 2020 horrible disease but finally started doing better. But first vaccine made me sick for two weeks with Covid. Doctors say good that showing your immune system working (bah hum bug) a lie. 2d shot got blood clot that caused small R sided heart attack. Now 2022 Dec No vaccine taken. Had 3d bout with Covid (no vaccine). This time I had bad chills but no temp throwing up the clear frothy phlegm urgent med gave me capsule for virus and steroids. Had lasix here at house every time my lungs fill with fluid would take 20 mg (Saved my life to have lasix) took lasix 4 different times. No brain fog or loss of memory with this bout. Sick for 3 weeks and it still lingering but I will hang in there. No vaccines for me anymore.". The action taken with covid-19 vaccine ad26.cov2.s was not applicable. The patient had not recovered from suspected covid-19, and the outcome of blood clot, lungs fill with fluid and small r sided heart attack was not reported. This report was serious (Other Medically Important Condition). This report was associated with product quality complaint 90000263929. The suspected product quality complaint has been confirmed to be the reported allegation could not be determined. A manufacturing related root cause could not be identified based on the PQC evaluation/investigation performed.; Sender's Comments: V0: 20221244172-Blood clot. The event has an unknown/unclear temporal relationship, is unlabeled, and is scientifically plausible. There is no information on any other factors potentially associated with the event. Therefore, the WHO Causality is considered indeterminate. The company causality is considered unassessable.  20221244172-lungs fill with fluid and small r sided heart attack . The event has an unknown/unclear temporal relationship, is unlabeled, and has unknown scientific plausibility. There is no information on any other factors potentially associated with the event. Therefore, the WHO Causality is considered indeterminate. The company causality is considered unassessable.