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.
Ct values of severe acute respiratory syndrome coronavirus 2–positive samples tested by reverse transcription PCR, the BinaxNOW COVID-19 Ag Card (BinaxNOW; Abbott Laboratories, https://www.abbott.com), and viral culturing. Ct, cycle threshold.
