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.
Abbreviations: Hi, H. influenzae; NmA, N. meningitidis serogroup A; NmC, N. meningitidis serogroup C; NmW, N. meningitidis serogroup W; NmX, N. meningitidis serogroup X; NmY, N. meningitidis serogroup Y; Sp, S. pneumoniae.
