So from the headlines we can see both patients are

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So from the headlines we can see both patients are not in good shape and we assume both does not have ARDS yet, hope to hear more from NP today. From my understanding once ARDS sets its too late.

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Most likely they do have ARDS. Which doesn't mean it's hopeless. Whatever therapy that is used should be fairly fast acting. I have not been able to find out exactly how fast leronlimab binds. The closest I have found is serum concentrations with a 324mg dose. Leronlimab serum levels at 6 hours are 1mg/ml peaking at 13.6 mg/ml at 72 hours. But the binding would be faster than that suggests. Leronlimab will go to the lymphatic system first and start binding there before residuals enter the bloodstream.