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) Relationship between collision frequencies and H9N2 AIV concentrations. (B) Linear curve between collision frequencies and the logarithm of H9N2 AIV concentrations (from 25 fg/mL to 25 ng/mL). (C) Histogram for the specificity of this method by using H9N2 AIV samples and other viruses (H1N1, H7N9, PRV, and NDV). (D) Collision frequencies responses for H9N2 AIV in complex systems.
