Patient had her second COVID vaccine on 2/20/21.  The next day she developed diffuse body aches.  She went on to develop worsening dyspnea and fever to 103°F on February 23.  She had a fever again on February 24. The patient also experienced a few episodes of vomiting and diarrhea but no abdominal pain and had pain of the legs, right greater than left. Blotchy red patches of the hands and arms developed.  She therefore presented to the ER on 2/25/21.  See full history below from infectious disease note on 3/1/21: Patient  is an 80 year old female who has a past medical history notable for hypertension, dyslipidemia, and hypothyroidism. The patient was diagnosed with a high-grade lymphoma of the retroperitoneum in 2004 and completed 4 cycles of multi-chemotherapy (Cytoxan, Adriamycin, vincristine, methotrexate, and IT chemotherapy (Magrath-like regimen)). She completed 4 cycles with complete remission on PET scan. The biopsy of a left cervical lymph node in 2007 revealed follicular lymphoma and she completed radiation therapy to the neck with complete remission. A left axillary lymph node biopsy in 2016 revealed grade-3 follicular lymphoma with mixed follicular and diffuse histology. Chemotherapy was pursued. The biopsy of a pelvic lymph node in 2019 was consistent with G1-2 follicular lymphoma.  She completed radiation to the pelvis in May of 2019.  She developed progressive pelvic adenopathy in April of 2020 and received 5 cycles of chemotherapy. Subsequent CT showed improvement in the adenopathy.  Her course was complicated by pulmonary emboli (September 2020).  In November of 2020 she was started on maintenance Rituxan every 2 months.  She received the 2-dose Pfizer COVID vaccine series on 1/29/21 and 2/20/21.   With the above background, the patient presented to the emergency room on February 25, 2021 with complaints of diffuse body aches, which had developed that day after receiving her second dose of COVID-19 (SARS-CoV-2) vaccine.  She went on to develop worsening dyspnea and fever to 103°F on February 23.  She had a fever again on February 24. The patient also experienced a few episodes of vomiting and diarrhea but no abdominal pain and had pain of the legs, right greater than left. Blotchy red patches of the hands and arms developed.  She called Oncology on February 20 and it was recommended that she go to the emergency room for evaluation.    She was afebrile on presentation to the emergency room.  She was tachycardic, however, with a pulse rate of 117 bpm.  She was breathing at 48 breaths per minute.  Blood pressure was 105/80 mmHg.  Oxygen saturation by pulse oximetry was 96%. Examination was notable for paraspinous muscle tenderness, tachypnea, mild respiratory distress, and a mildly distended abdomen.  Mild erythematous patches of the feet and forearm were noted, as well as evidence of edema of the right leg from the knee to the lower leg. The peripheral blood leukocyte count measured 0.8x10e3/µL.  ANC was 0.48x10e3/µL.  Platelets measured 96x10e3/µL.  Creatinine was 0.97 mg/dL.  AST was 86 and ALT 20 U/L. The lactic acid level of the venous blood was 3.6 mmol/L. The procalcitonin level of the blood measured 28.37 ng/mL. The C-reactive protein level was 313.7 mg/deciliter. The creatine kinase (CK) level was 4023 U/L.  LDH measured 314 U/L. Troponin was 3.22 ng/mL.  Urinalysis showed 6-10 wbc?s, 0-2 rbc?s/hpf, 3+ blood, negative nitrites, hyaline and granular casts as well as amorphus crystals. A chest radiograph showed possible, but not definite, mild atelectasis or infiltrate at the left lung base.  A radiograph of the right tibia/fibula showed circumferential soft tissue edema seen within the knee and upper to mid aspect of the lower leg.  EKG showed sinus tachycardia but no evidence of arrhythmia or ischemia. Cultures of specimens of the blood were obtained.  The patient was started empirically on vancomycin and cefepime and was admitted.   Faint erythema and ecchymosis of the right leg extending to the dorsal right foot and right wrist erythema were noted following the patient?s admission.  Her condition subsequently destabilized with increased respiratory rate, worsening pain, and hypotension, so she was transferred to the ICU. An abdominopelvic CT on February 25 revealed a small amount of free fluid in the abdomen around the liver, cholelithiasis with no evidence of acute cholecystitis or biliary dilatation, a nonobstructing 5-mm stone of the mid pole of the left kidney, coronary artery calcifications, mild infiltration of the fat in the inferior retroperitoneum and along the right common iliac region with small nodes in this region, similar compared with September 24, 2020, but improved compared with April 30, 2020, and consistent with response of lymphoma to chemotherapy; a myomatous uterus. A CT scan of the right lower extremity showed extensive edema about the subcutaneous tissues of the right lower leg and infiltration of the fat about the muscles of the right lower leg, likely representing cellulitis and fasciitis, and possible myositis. However, there was no air within the subcutaneous tissues or muscles to suggest necrotizing fasciitis and no evidence of abscess.     The patient?s antibiotic treatment was later changed to vancomycin, piperacillin-tazobactam and clindamycin. Cultures of specimens of the blood were later reported as being positive for methicillin-susceptible Staphylococcus aureus on 2/2 sets.  Repeat blood cultures (February 26) were positive as well. Her antibiotics were modified to cefazolin monotherapy.  Repeat blood cultures on Feb 27 and 28 were negative.      TTE completed 2/27/21 without obvious vegetation.    TODAY (3/1/21): Cultures negative 2/27 and 2/28. Remains on IVIG. Afebrile. She complaints of continued pain in the Right leg and swelling at that left arm.  Exam GENERAL: NAD EYES: Sclera and conjunctiva clear   NECK: no adenopathy  LUNGS: Breath sounds normal and symmetric. No rales or wheezes. HEART: regular rhythm, no murmur appreciated ABDOMEN: Soft without mass, tenderness, organomegaly or hernia. EXTREMITIES: RLE with ecchymosis, slight overlying erythema and anterior blister: blistering more pronounced today. left foot with plantar erythema, some tenderness today.  LUE fullness with some heat/tenderness SKIN: No other rashes or other abnormalities are noted.  NEUROLOGICAL: alert, appropriate  Assessment  1. MSSA septicemia with shock. Positive blood cultures 2/25 and 2/26 thus far. Negative since 2/27.  2. Multifocal cellulitis and interstitial infective myositis of LE- suspect related to above. CT scan was negative for apparent necrotizing infection.  3. Elevated CK due to above- improving 4. Recurrent lymphoma- has been on maintenance rituximab (11/2020). Immunocompromised state.  5. Low immunoglobulins- remains on IVIG 6. Positive urine cultures with Staph aureus- this is typically secondary seeding from bacteremia rather than primary staph uti. CT abd/pelvis negative for nidus of infection along GU track (no renal abscess for example) 7. LUE swelling/tenderness.    Plan  1. Cont Cefazolin without change: goal dosing 8gm/24hr 2. Following repeat blood cultures, negative thus far (tentative D0= 2/27/21) 3. Pending course, anticipate likely TEE--- > presently precluded due to thrombocytopenia 4. Will obtained LUE doppler for completeness given pain/swelling here. Down the line, may need to consider additional imaging (CT?) if concern for abscess, etc).  5. ID will follow along with you. Please call if any questions/concerns.   Patient is still admitted, and is in the ICU.