If you don't feel well, you may worry that you have COVID-19. The only way to know for sure is to take a test. At-home tests can tell whether you have the virus right now. More specialized antibody ...

Vitamin D tests involve taking a blood sample to measure the vitamin D levels in your bloodstream. There are two forms of vitamin D in the blood: 25-hydroxy vitamin D, or calcidiol, and 1,25-dihydroxy ...

At-home thyroid tests require taking your own blood sample. Results vary by service but usually 2-5 days. Some services offer follow-up consultations with abnormal results. LetsGetChecked Thyroid ...

At-home STD tests offer convenience and privacy while testing for sexually transmitted diseases (STDs). These diseases are also called sexually transmitted infections (STIs). If you're sexually active ...

By championing the simple phrase “Ask for an HIV Test,” experts with the Rutgers School of Nursing’s François-Xavier Bagnoud ...