- Merck Ends COVID Vaccine Program, Cites Inferior Immune ResponsesHuffPost
- Merck ends COVID-19 vaccine program, cites inferior immune responsesFox Business
- Merck ends Covid vaccine program but continues work on treatmentsCNBC Television
- Merck ends Covid vaccine program, citing inferior immune responsesCNBC
- Merck discontinues two Covid-19 vaccine candidatesNBC News
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