Inclusion Criteria:  Age 18 and above Positive for SARS-CoV-2 (via PCR) Decreased blood oxygen saturation: Room air SaO2 < 94% and/or requiring supplemental oxygen at a flow rate of 2 L/min or greater Admission to the hospital  Exclusion Criteria:  Pregnant women Asplenia Ascites Open wound/sores near the stimulation site Recent abdominal surgery Splenomegaly Mechanically ventilated (if patient goes onto mechanical ventilation while participating in the study, they can continue ultrasound treatment if recommended by SOC clinician and investigators of this study) Comfort care status Any other clinical reasons deemed by the investigators of the study in which the patient would not be an appropriate candidate for the study