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.
A, Daily sensitivity of 3 home antigen testing protocols; the reference standard was a positive reverse transcription–polymerase chain reaction (RT-PCR) test at any time during the investigation. B, Daily difference in testing protocol sensitivities. For protocols 2 and 3, sensitivity is displayed by day of the first test collected.
