Overview of Testing for SARS-CoV-2 | COVID-19 | CDC Positive viral test results indicate current infection and the person with COVID-19 should take steps to prevent spreading COVID-19 to others Negative viral test results mean the test did not detect the virus, but this doesn't rule out that the person could have an infection These results represent a snapshot of the time around specimen
Testing for COVID-19 | COVID-19 | CDC - Centers for Disease Control and . . . A single NAAT test can be used to confirm an antigen test result *Self-tests, or at-home tests, are antigen tests that can be taken anywhere without having to go to a specific testing site Read self-test package inserts thoroughly and follow the instructions closely when performing the test When you get tested
Fit Testing | Personal Protective Equipment | CDC The test is a pass fail test that determines whether you can detect a test agent, such as through taste, smell, or an involuntary cough The OSHA-accepted fit test protocols provide complete instructions for conducting qualitative fit tests with the accepted test agents NIOSH does not endorse or recommend the use of the irritant smoke fit test
Clinical Testing and Diagnosis for Tuberculosis It is the only kind of TB skin test solution that is FDA-approved for this test method After 48–72 hours, the skin test reaction must be examined by a trained health care worker The health care worker measures any swelling where the tuberculin was injected to determine if the reaction to the test is positive or negative
Guidelines and Recommendations | HIV Partners | CDC The 2017 technical update provides information on the use of the Alere Determine HIV 1 2 Ag Ab Combo single use rapid test (Determine) in laboratories where it is not feasible to conduct an instrumented antigen antibody test as the initial test in the algorithm
This is a TEST | State and Local Readiness | CDC TEST is a collaborative game that bridges the gap between discussion and operational exercises It uses narrative-based problems to foster teamwork, discuss resource management, and aid in understanding specific roles and responsibilities during an emergency
Laboratory Testing for Epstein-Barr Virus (EBV) Monospot test The Monospot test is not recommended for general use The antibodies detected by Monospot can be caused by conditions other than infectious mononucleosis Moreover, studies have shown that the Monospot produces both false positive and false negative results
Waived Tests | Laboratory Quality | CDC Waived tests include test systems cleared by the FDA for home use and those approved for waiver under the CLIA criteria While CLIA requires waived tests to be simple and low-risk, they are not completely error-proof Errors can occur in testing if manufacturer's instructions are not followed or if personnel are unfamiliar with the test system
Screening for Breast Cancer | Breast Cancer | CDC - Centers for Disease . . . Other potential harms from breast cancer screening include pain during procedures and radiation exposure from the mammogram test itself While the amount of radiation in a mammogram is small, there may be risks with having repeated x-rays