Figure 4.
Cumulative hazard estimates for control (dashed) and experimental (solid) premises. The vertical axis shows the Nelson-Aalen estimate, a non-parametric estimate of the cumulative hazard and the horizontal axis is time in days.
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.