Targeting Vascular INflammation in Patients With Community-Acquired Pneumonia

Inclusion Criteria: Patients who have: 1. Hospitalization with CAP (defined as pulmonary infiltration using chest imaging, in addition to other clinical symptoms including fever, cough, and sputum) 2. age \> 18 years; 3. given informed consent. Exclusion Criteria: Patients who have: 1. history of cancer within the last 3 years (other than a successfully treated cutaneous squamous cell or basal cell carcinoma or localized carcinoma in situ of the cervix). 2. active inflammatory conditions (e.g. rheumatoid arthritis, chronic inflammatory bowel disease, SLE, systemic anti-inflammatory therapy (e.g. prednisone, methotrexate)); 3. pregnancy (all women of child bearing potential will have a negative BHCG test; 4. breastfeeding; 5. Women of childbearing potential who refuse to use two forms of contraception (this includes at least one form of highly effective and one effective method of contraception) throughout the study OR men capable of fathering a child who refuse to use contraception. 6. Allergies to icosapent ethyl 7. allergies to fish or shellfish 8. glomerular filtration rate (GFR) \<50 ml/min/1.72m2 (excluded from CTA portion) 9. unable to give informed consent; Exclusion for CTA portion of the protocol: Patients with dye allergy will not undergo CTA but will have PET/CT