Knowing whether you’re a genetic carrier for a disease can be invaluable. A patient who learns she’s at heightened risk for breast cancer, for example, may opt for more frequent mammograms or have a ...

The Centers for Disease Control and Prevention on Friday said unvaccinated students exposed to COVID-19 can remain in school if they undergo testing — as three New York City schools closed in one day.

Tests are king in many school systems and other educational environments: they are seen as an efficient way to assess what knowledge students have retained, and how well they do on a level playing ...

Two months after the first case of coronavirus disease 2019 (COVID-19) was confirmed in early 2020, South Korea was commended by many international partners for its efforts to contain the outbreak and ...