Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Duration from symptom onset to the maximum supplemental oxygen and the mean of peak oxygen flow in 144 non-ICU patients. The blue bar represents the number of non-ICU patients, and the orange dot represents the mean of peak oxygen flow at that time. The day of symptom onset is defined as Day 0.
