COMPUTERISED TOMOGRAM; ELECTROCARDIOGRAM; LABORATORY TEST; PULMONARY EMBOLISM; X-RAY; PAIN ON THE RIGHT-HAND SIDE UNDER MY RIBS; MYALGIA; ULTRASOUND SCAN; LUNG COLLAPSED; FLUID IN THE BOTTOM OF HER LUNG; This spontaneous report received from a patient via Regulatory Authority VAERS (Vaccine Adverse Event Reporting System) and concerned a 62-year-old female patient. The patient's height, and weight were not reported. The patient's concurrent conditions included depression, and penicillin allergy. The patient had no current illness. The patient had no heart problems, no pulmonary problem and diabetes. The patient experienced drug allergy when treated with paracetamol.  The patient received covid-19 vaccine ad26.cov2.s (suspension for injection, intramuscular, batch number: 206A21A expiry: UNKNOWN) dose was not reported, 1 total, administered on 11-APR-2021 to left arm for prophylactic vaccination. Concomitant medications included levomilnacipran hydrochloride for depression, and quetiapine fumarate for depression.  On an unspecified date in APR/2021, little more than a week after single-dose coronavirus vaccine at hospital facility the patient felt general malaise and minor pain in her right side. The patient had shortness of breath, and she looked anxious and her heart rate was very fast. The vital signs were not stable. The physician suspected that patient had developed pulmonary embolism blood clots in her lungs. When combined with her vitals, the doctor knew it was an emergency. The patient also began to feel mildly ill. She was experienced general malaise, soreness on her right side, and while she was not struggling to breathe, it hurt when she took a deep breath, her right-hand side, like under her ribs, she felt some pain. It was not a bad pain, not enough to take anything for it but just noticed it. The symptoms seemed minor, and at the time. It was reported that by 21-APR-2021, she still was not feeling well and decided to make an appointment at the urgent care center. The patient visited emergency room or department/urgent care facility for treatment of the events. The patient soon learned she had developed blood clots (pulmonary embolism) in both lungs due to the vaccine, a doctor at the hospital told her. One of her lungs also had collapsed. She had developed blood clots in both lungs due to the vaccine, she was there for 10 hours (undergoing tests). The patient underwent a computerized tomography scan and an X-ray. They did everything and got the results of the CAT scan, with pulmonary embolism in both lungs. They immediately gave her some blood thinner and was as hospitalized (date unspecified). It was reported that she would spend five days in the hospital.  According to the doctors this was from the vaccine. The patient was also experiencing the pain on the right-hand side and also started getting myalgia, muscle aches just in different parts of her body. The patient's legs also felt weird. So they rushed her down and gave a sonogram in her legs to check for deep vein thrombosis. The pain on her right side grew worse for a day or two, and she was treated with morphine. The doctors surmised the patient had fluid in the bottom of her lung, which her body eventually absorbed. The patient was still on a blood thinner and continued to recover. Laboratory data included: Heart rate (NR: not provided) very fast, and Sonogram (NR: not provided) Not provided. On an unspecified date in APR-2021, Laboratory data included: Computerised tomogram (NR: not provided) pulmonary embolisms in both lungs, Electrocardiogram (NR: not provided) Not provided, Laboratory test (NR: not provided) Not provided, Ultrasound scan (NR: not provided) Not provided, and X-ray (NR: not provided) Not provided. The action taken with covid-19 vaccine ad26.cov2.s was not applicable. The patient was recovering from pulmonary embolism, had not recovered from computerised tomogram, electrocardiogram, laboratory test, ultrasound scan, and x-ray, and the outcome of myalgia, fluid in the bottom of her lung, lung collapsed and pain on the right-hand side under my ribs was not reported. This report was serious (Hospitalization Caused / Prolonged, and Other Medically Important Condition).  Additional information was received from company representative via social media on 18-MAY-2021. The following information was updated and incorporated into the case narrative: patient's city added, events added (pain on the right-hand side under my ribs, myalgia, lung collapsed, fluid in the bottom of her lung), CT scan result updated, lab data updated (Heart rate and Sonogram).; Sender's Comments: V1: The follow up information in this version updates Patient's city, events (pain on the right-hand side under my ribs, myalgia, lung collapsed, fluid in the bottom of her lung), CT scan result updated, lab data updated (Heart rate and Sonogram). The follow up information received in this version does not alter the causality of the previously reported events 20210514298-COVID-19 VACCINE AD26.COV2.S-fluid in the bottom of her lung, pain on the right-hand side under my ribs: These events are considered unassessable. The events have a compatible/suggestive temporal relationship, are unlabeled, and have unknown scientific plausibility. There is no information on any other factors potentially associated with the events. 20210514298- COVID-19 VACCINE AD26.COV2.S-myalgia. This event is labeled per RSI and is therefore considered potentially related.  20210514298-COVID-19 VACCINE AD26.COV2.S-Pulmonary embolism, computerized tomogram, electrocardiogram ,laboratory test, ultrasound scan, X-Ray: These events are considered unassessable. The events have a compatible/suggestive temporal relationship, are unlabeled, and have unknown scientific plausibility. There is no information on any other factors potentially associated with the events.