Brad Reisfeld is a professor of chemical and biological engineering, biomedical engineering, and public health at Colorado State University. Your blood serves numerous roles to maintain your health.

Update: This program has ended and free tests are not current available from the government website. The Biden administration has resumed taking orders for free at-home COVID-19 tests as of Sept. 25.

Here’s how to get them, plus when to take a test. By Dani Blum Starting Thursday, you can once again order free Covid tests from the government. Every household in the United States will be able to ...

These days, many people use at-home COVID-19 tests when they feel ill, rather than going out to get tested by a professional. (That’s when they bother to test at all.) But for all their convenience, ...

Coronavirus infections have come roaring back this year, prompting the Biden administration to renew one of its earliest responses to the COVID-19 pandemic: Free at-home test kits delivered via the ...

New findings suggest blood tests still being assessed are showing promising results for early cancer screenings, especially ...

Ask Erin Mantz why she loves personality tests, and she’ll tell you she’s a Pisces, an only child, and an introvert prone to self-reflection. “I’m constantly craving and searching for insights into ...

A new paper from Jamil Maroun and Christopher Tienken sets out to determine whether a state’s big standardized test measures student learning, teacher effectiveness, or something else. The answer, it ...