An official website of the United States government
Here's how you know
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.
Proportion of subjects with postvaccination HAI titers of ≥1:32. (A) Results for the 5- to 8-year-old cohort; (B) results for the 9- to 49-year-old cohort.