Merck Unveils Virus Vaccine Candidates While Warning on Timeline
A laboratory technician watches as a Proditec SAS Vistab 2 machine checks Concor blood pressure tablets for any imperfections in the laboratories at the Merck KGaA headquarters in Darmstadt, Germany. (Photographer: Krisztian Bocsi/Bloomberg)

Merck Unveils Virus Vaccine Candidates While Warning on Timeline

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(Bloomberg) --