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.
Forest plot of the male to female viral meningitis incidence rate ratios (RR) for different years in Canada, Czech Republic, Germany, Israel, and Poland in early childhood (ages 1–4). (The shading indicates the weight of the study in the analysis). CI = confidence interval. RR = rate ratio.
