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.
Schematic diagram showing environmental sampling sites in the inpatient area of the hospital. The presence of the virus is indicated in red and the absence in green. Contaminated areas are those close air (<1 m) at patients at 1.5 m of height for 1 h. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
