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.
Total number of tests performed per 3-year period, broken down within each bar by frequency of testing (1, 2, 3, 4, 5, ≥6 tests per person: the darker the shading the greater the test frequency). Tests performed on a total of 355 517 individuals.
