SECAUCUS, N.J., Feb. 24, 2021 /PRNewswire/ -- Quest Diagnostics (NYSE: DGX), the world's leading provider of diagnostic information services, today introduced a new COVID-19 testing service that aids ...

Narrow-moat Quest Diagnostics delivered second-quarter results that slightly exceeded our expectations on the top line, but that was offset by earnings that fell slightly short of our full-year ...