The best at-home COVID-19 tests are FDA-authorized, easy to use, accurate, quick, and can also detect flu viruses. Lauren Paige Richeson is an Editor at Health, where she’s been writing, editing, and ...

Known also as an E2 test, an estradiol test measures the amount of the hormone estradiol in your blood, which is essential for bone and joint health in females and helps control how fat is distributed ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Khadija Khartit is a strategy, investment, and ...

The top free internet speed test apps are Meteor for app-specific performance insights, Speedtest by Ookla for all-around network testing, and FAST Speed Test for quick ad-free checks. Several factors ...

Learn how to optimize your PCBA testing strategy by combining In-Circuit Testing, Functional Testing with Bed-of-Nails or Flying Probe Testers.

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...

An antinuclear antibody (ANA) test checks your blood for certain types of antibodies called autoantibodies. Autoantibodies commonly develop in people with autoimmune conditions, but they can show up ...

A tuberculosis (TB) skin test involves a small injection of tuberculin under your skin, which a healthcare professional will check 48 to 72 hours later for a raised bump called an induration. Whether ...

You’re probably no stranger to having a nurse draw multiple vials of blood at annual checkups. You might not think twice about this (except, ouch!). But once evaluated, these samples reveal how well ...

Compare the best penetration testing tools for 2026, including pricing, key features, use cases, and top picks for modern security teams today. Penetration testing tools help security teams identify ...