When to ask a doctor about covid-19 blood test results: ‘It’s a test for something that is already there’

Researchers are testing the effectiveness of a blood test that can detect the presence of coronavirus in patients with symptoms of the virus.The test, known as a dimer, has been used to test for coronaviruses for decades.The tests, which are used to diagnose coronaviremia in people with a history of the coronaviral illness, are typically given to people with mild or moderate symptoms, such as...