This study is testing an experimental drug called "LY3819253" that will provide antibodies that is thought to fight the COVID-19 virus.The subject will receive the study drug (either the experimental study drug or the placebo) only once, on the day he/she joins the study (study "Day 0"). The subject will get it by an intravenous (IV) drip through a tube attached to a needle in the arm. This is called an infusion. As part of the study the subject will also get a study drug called remdesivir once a day intravenously for up to 10 days while in the hospital, as care for COVID-19, unless the study doctor thinks remdesivir would not be safe to be taken. The study will last for 90 days.

BLUE CORAL is an observational, biorepository study for patients who are hospitalized with COVID-19. The study collects various data and biospecimens, such as blood, urine, and tracheal aspirates, during the patient's hospital stay. The data and biospecimens collected will be used to provide greater knowledge on the biology and epidemiology of COVID-19.

This is a research study of different ways to use intravenous fluids (fluids given through a small tube placed in the vein) and vasopressors (medicines used to raise blood pressure) to treat sepsis, which is a serious infection. We are asking you to be in this study because: a) you have been diagnosed with low blood pressure due to an infection and b) your blood pressure has stayed low after your doctors gave you fluids. We do not know which approach is better in this situation: a)starting medicines to raise blood pressure first and then giving more fluids (if needed), or b) giving a larger amount of fluids first and then giving medicines to raise blood pressure if needed. Right now, the choice of approach is left to the doctors. Some doctors use medicines to raise blood pressure followed by extra fluids, and others use extra fluids followed by medicines to raise blood pressure. Some doctors use a combination of the two. This treatment part of the study will last for 24 hours, and then we will follow you until you go back to where you live. We want to find out whether one of these approaches compared to the other can improve a patient's chances of survival.