there seems to be a window of opportunity to use it early in the infection. I believe the Lancet published the study and it needs to be used in the first 10 day

there seems to be a window of opportunity to use it early in the infection. I believe the Lancet published the study and it needs to be used in the first 10 days, however most people are only just thinking of going to the hospital at that stage of the infection. Although if this is approved for use perhaps we will see it being prescribed earlier, especially of combined with better and more widespread testing