Your electronic devices may have alarmed you on Wednesday — and there's a reason for that. A nationwide test of the federal emergency alert system started broadcasting just before 2:20 p.m. EDT to ...

SAN FRANCISCO -- There has been a lot of talk about testing for the coronavirus, but you may not entirely understand what the different tests are for. The coronavirus makes some people sick, some ...

Tests performed on sewage from homes in part of Northern Virginia indicate more COVID-19 cases than what other testing methods have found. Stafford County is having its wastewater analyzed to detect ...