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
Screening for Cervical Cancer | Cervical Cancer | CDC The HPV test and the Pap test can help prevent cervical cancer or find it early The HPV test looks for the virus (human papillomavirus) that can cause cell changes on the cervix The Pap test (or Pap smear) looks for precancers, cell changes on the cervix that might become cervical cancer if they are not treated appropriately
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
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
Diagnosing Tuberculosis | Tuberculosis (TB) | CDC Understanding TB blood test or TB skin test results A positive test result for TB infection means you have TB germs in your body Your health care provider will do other tests to determine if you have inactive TB or active TB disease These tests may include a chest x-ray, and a test of the sputum (phlegm) you cough up
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
Screening for Genital Herpes | Genital Herpes | CDC The chances of wrong test results are higher for people who are at low risk of infection Blood tests might be useful if: You have genital symptoms that could be related to herpes You have (or have had) a sex partner with genital herpes Your provider found signs of herpes, but you still need a test to confirm it
Attention-Deficit Hyperactivity Disorder (ADHD) - CDC There is no single test to diagnose ADHD, and many other problems, such as sleep disorders, anxiety, depression, and certain types of learning disabilities, can also have symptoms similar to ADHD When to talk with a doctor
Laboratory Testing for Norovirus | Norovirus | CDC These assays can be used for preliminary identification of norovirus when testing multiple specimens during outbreaks However, samples that test negative should be confirmed by a second technique, such as RT-qPCR Thus, EIA kits should not replace RT-qPCR during outbreak investigations Genotyping