A fasting blood test requires you to avoid eating or drinking anything for some time before your test. The amount of time to fast varies for different tests. It’s generally in the range of 8 to 12 ...

To become a U.S. citizen, you now have to take a citizenship test that’s twice as long as it was before, with more than half ...

A TB blood test is a diagnostic test to detect the presence of Mycobacterium tuberculosis. This is the bacteria that causes tuberculosis (TB). These tests use a sample of blood to check for an immune ...

Infectious disease expert Dr. Mark Kortepeter explains the pros and cons of at-home Covid diagnostic tests and how to interpret the results. One of the major challenges with having everyone receive ...

I tested myself for COVID-19 from the comfort of my bedroom. I had never taken a rapid test before, but the instructions were easy to follow. Rapid antigen tests are convenient, but they're not as ...

A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.

Have your COVID-19 rapid tests expired? Don’t toss them yet. Federal regulators have extended some tests’ expiration dates, meaning certain offerings are now usable for months longer. The reason for ...

With COVID-19 rising this winter, it’s getting more complicated to discern whether you are infected. Dr. Elizabeth Hudson, regional chief of infectious diseases at Kaiser Permanente Southern ...

With COVID-19 cases on the rise again in the U.S., Americans are reviving a familiar precautionary measure: Screening for the virus using rapid at-home tests. Many people still have kits the ...

With home testing options increasing more than ever, you now also have the ability to test for kidney function within the comfort of your own home. Learn more about our four best picks for at-home ...

We regularly answer frequently asked questions about life during the coronavirus crisis. If you have a question you'd like us to consider for a future post, email us at [email protected] with the ...

Don't settle for sluggish Wi-Fi. Learn what internet speed tests mean and how to troubleshoot and fix common issues. Joe Supan is a senior writer for CNET covering home technology, broadband, and ...