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.
ITT = intent to treat; LAIV = live attenuated influenza vaccine. *One child randomized to receive H1N1 LAIV was inadvertently administered placebo for dose 1; this subject also received placebo for dose 2. This subject was included in the H1N1 group for ITT analyses, but was grouped with placebo subjects for safety analyses.
