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.
Epidemiologic relationship of patients involved in two outbreaks. Solid arrows indicate periods of hospital stay for each patient; broken arrows, hospital stay in different ward; and X, moment when first isolate was obtained from each patient. P, patient, UW, unrelated ward, W, ward.
