Mar 10, 2025 · Viral tests look for a current infection with SARS-CoV-2, the virus that causes COVID-19, by testing specimens from your nose or mouth. There are two main types of viral …

Aug 18, 2025 · Testing can help you find out if you are infected with a certain respiratory virus. While testing doesn't change how likely you are to catch or spread respiratory viruses, or how …

Aug 29, 2024 · Learn about the tests available for COVID-19, their differences, and health equity in testing.

Nov 19, 2025 · West Nile virus can result in mild illness with flu-like symptoms or severe illness that affects the central nervous system or results in hospitalization or death.

Dec 19, 2025 · This algorithm assists in the interpretation of influenza testing results and clinical decision-making during periods when influenza viruses are circulating in the community.

Sep 17, 2024 · Virus isolates are needed to characterize the circulating influenza A virus subtypes and influenza A and B virus strains and to determine how well they are matched antigenically …

Sep 24, 2025 · Additional guidance is provided on when to test for influenza, how to interpret influenza testing results, what influenza laboratory tests are available, and influenza specimen …

Dec 19, 2025 · Influenza virus testing is recommended for all patients with suspected influenza who are being admitted to hospital. Most importantly, clinicians should understand the …

Apr 11, 2024 · Infection with HMPV can be confirmed usually by direct detection of viral genome by nucleic acid amplification test (NAAT), and direct detection of viral antigens in respiratory …

May 15, 2025 · This page provides information for clinical and public health laboratories on testing for novel influenza A viruses, including for identification of avian influenza A (H5N1) virus in …