Fig 4.
Data tracked daily during the covid crisis using an annotated statistical process control chart at Albert Einstein Hospital. PPE=personal protective equipment; UCL=upper control limit
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.