Merck

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FILE - In this Thursday, Dec.18, 2014, file photograph, scientist Christopher Kistler checks on experiments in AMBR250 bio-reactors in a laboratory at the Merck company facilities in Kenilworth, N.J. Merck & Company, Inc. reports earnings, Friday, July 28, 2017. (AP Photo/Mel Evans, File)

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President Donald Trump speaks during an event to announce a Merck, Pfizer, and Corning joint partnership to make glass containers for medication, in the Roosevelt Room of the White House, Thursday, July 20, 2017, in Washington. With Trump are Rep. Tom Reed, R-N.Y., left, and Health and Human Services Secretary Tom Price. (AP Photo/Alex Brandon)

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President Donald Trump stands during an event to announce a Merck, Pfizer, and Corning joint partnership to make glass containers for medication, in the Roosevelt Room of the White House, Thursday, July 20, 2017, in Washington. (AP Photo/Alex Brandon)

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FILE - In this Thursday, Dec.18, 2014, file photograph, scientist Christopher Kistler checks on experiments in AMBR250 bio-reactors in a laboratory at the Merck company facilities in Kenilworth, N.J. The bio-reactors allow a large number of experiments to be done in the lab at the same time. On Tuesday, June 27, 2017, Merck & Co. said a new type of cholesterol drug, in testing for many years, reduced heart attacks, deaths and other complications of heart disease in a huge late-stage study. (AP Photo/Mel Evans, File)

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FILE - This Thursday, Dec. 18, 2014, file photograph, shows a sign at the Merck company facilities in Kenilworth, N.J. Merck & Company, Inc. reports earnings, Tuesday, May 2, 2017. (AP Photo/Mel Evans, File)

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FILE - In this Thursday, Dec. 18, 2014, file photograph, a man looks back at the Merck logo on a stained glass panel at a Merck company building in Kenilworth, N.J. Merck & Company, Inc. reports earnings, Tuesday, May 2, 2017. (AP Photo/Mel Evans, File)

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FILE - This Thursday, Dec. 18, 2014, file photo shows the Merck logo on a stained glass panel at a Merck company building in Kenilworth, N.J. Merck & Co. reports financial results Thursday, Feb. 2, 2017. (AP Photo/Mel Evans, File)

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President Donald Trump listens during a meeting with pharmaceutical industry leaders in the Roosevelt Room of the White House in Washington, Tuesday, Jan. 31, 2017. From left are, PhRMA president Stephen Ubl, Merck CEO Kenneth Frazier, Trump, Celgene CEO Robert Hugin, and Amgen CEO Robert Bradway (AP Photo/Evan Vucci)

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This image made available by Merck in October 2016 shows a vial and package for their GARDASIL 9 human papillomavirus vaccine. On Wednesday, Oct. 19, 2016, a government panel said preteens need only get two doses of HPV vaccine instead of three _ a move some hope will raise languishing HPV vaccination rates. Health officials say fewer than a third of 13-year-old U.S. boys and girls get all the necessary shots to protect them against human papillomaviruses (Merck via AP)