Quest Diagnostics Buckles up to Fight Monkeypox Quest Diagnostics (NYSE: DGX), a leading provider of diagnostic information services, recently announced the launch of its lab-developed molecular diagnostic test for the monkeypox virus. In a release, the company said, "The polymerase chain reaction (PCR) test is the first commercially available test to be developed and made available by a national laboratory provider for helping in the qualitative detection and differentiation of monkeypox virus DNA from other non-variola orthopoxviruses." Quest Diagnostics expects to conduct around 30,000 monkeypox virus tests a week by the end of July. The company can also enhance its capacity for monkeypox testing across other laboratories in its national network if the demand is too high.