Inclusion Criteria:  Patients > 40 years Written informed consent New (within 24 hours) COVID-19 diagnosis Serum 25OHD levels drawn at time of COVID-19 laboratory workup  Exclusion Criteria:  Asymptomatic patients Patients already taking ASA and other anti-coagulant / anti-platelet therapies including but not limited to clopidogrel, heparin, low molecular weight heparin, coumadin, apixaban. Pregnant patients or prisoners History of GI bleeding or peptic ulcer disease, or spontaneous bleeding from other sites Thrombocytopenia (platelets <130,000/uL) at time of COVID diagnosis Anemia at time of COVID diagnosis (defined as hemoglobin level <12 g/dl in men or <11 g/dl in women)22 History of chronic kidney disease Concurrent use of nonsteroidal anti-inflammatory drugs, or steroids Hypervitaminosis D and associated risk factors: Renal failure, Liver failure, Hyperparathyroidism, Sarcoidosis, Histoplasmosis Known allergy to Aspirin Inability to tolerate oral medications Known history of aspirin-induced asthma History of bleeding problems Patients who cannot avoid drinking 3 or more alcoholic drinks every day during the 30-day course of ASA treatment Patients who cannot stop taking other nonprescription NSAIDs (ibuprofen, naproxen, or others) during the 30-day course of ASA treatment Patients requiring hospitalization (for any reason) at time of screening Patients taking or who plan to take on an outpatient basis remdisivir, dexamethasone, or other therapies for treatment of COVID