You may keep testing positive for COVID-19 even after feeling better for weeks or months. PCR tests are more sensitive and can show a positive result long after you're not contagious. Most people are ...

If you're lactose intolerant, you will notice symptoms after you consume dairy. A hydrogen breath test measures hydrogen levels to check for lactose intolerance. A glucose blood test can show lactose ...

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 ...

At-home testosterone test kits use a finger-prick blood sample, with results generally available within a week. Some companies also offer saliva-based tests, which are pain-free and easy to collect, ...

For generations of U.S. schoolchildren, phrases like "shuttle run" and "sit-and-reach" likely conjure vivid memories of what was once a staple of American physical education: the Presidential Fitness ...

Taking a pregnancy test too early can produce a false negative result. And the prospect of a major life change like pregnancy is a time when you want to make sure you're getting the most accurate ...

CNET dug into the latest speed test data to see how the country’s largest cable internet provider fared in national speed test data. Trey Paul was a CNET senior editor covering broadband. His 20+ ...

Don't throw out your expired COVID tests just yet. Here's how to find out if the expiration date has been extended. Katie covered all things how-to at CNET, with a focus on Social Security and notable ...