Jul 18, 2024 · The FDA requires that rapid antigen diagnostic tests catch at least 80% of infections. To lower the risk of false-negative results, the FDA recommends testing more than …

Oct 24, 2025 · How do COVID-19 antibody tests differ from diagnostic tests? I've heard about antibody testing for COVID-19. What is antibody testing? Is it the same as testing to diagnose …

Jun 14, 2025 · Diagnosis of an H. pylori infection involves testing to find out if your symptoms are caused by H. pylori germs. Your healthcare professional may recommend one or more of the …

Apr 29, 2025 · Overview The extractable nuclear antigen test, known as an ENA test, is a blood test that checks for proteins in your blood, also known as antibodies. The ENA test is used to …

Apr 30, 2025 · The PSA test is a blood test used primarily to screen for prostate cancer. The test measures the amount of prostate-specific antigen (PSA) in your blood. PSA is a protein …

Mar 7, 2025 · Overview A CA 125 test measures the amount of the protein cancer antigen 125 in the blood. Cancer antigen 125 also is called CA 125. This test may be used to monitor certain …

Aug 6, 2025 · The cancer antigen 125 (CA 125) blood test generally isn't recommended if you have an average risk of ovarian cancer. Sometimes ovarian cancer causes a higher level of …

Dec 20, 2022 · Antibody testing also is known as serology testing. A negative serology test means no antibodies were detected in your blood. An antibody test can't find out whether you're …

May 24, 2025 · Often a rising level of prostate-specific antigen, also called PSA, in the blood is the first sign of recurrent prostate cancer. If a blood test shows elevated PSA levels, your …

Sep 15, 2025 · To diagnose von Willebrand disease, your healthcare professional asks about your medical and bleeding history and checks for bruises or other signs of recent bleeding. …