Astrazeneca

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This file photo of vial and syringes shows the AstraZeneca COVID-19 vaccine, on March 22, 2021. Data from a U.S. study on its vaccine shows it is 79% effective. (AP Photo/Alberto Pezzali, File)

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AstraZeneca Vaccine Time Illustration by Greg Groesch/The Washington Times

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FILE - In this file photo dated Jan. 29, 2009, reflections are seen in the sign at the global headquarters of AstraZeneca in London. Shares in Anglo-Swedish drugmaker AstraZeneca plunged 16 percent on Thursday July 27, 2017, after a new lung cancer drug trial did not prove as successful as the company had hoped. (AP Photo/Kirsty Wigglesworth/FILE)

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This undated photo provided by AstraZeneca on May 26, 2017 shows their CEO Guy Yeoman. Drugmakers, including AstraZeneca, are finding they can improve how drug testing is conducted_ and help their own bottom lines _ by giving patients a voice before testing even begins. (AstraZeneca via AP)

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This image provided by AstraZeneca shows the company's drug Imfinzi, known chemically as durvalumab. On Monday, May 1, 2017, the Food and Drug Administration approved Imfinzi, part of the new generation of immuno-oncology drugs, which help the immune system to fight off cancer. The FDA also approved a companion diagnostic test for identifying which patients are most likely to benefit from the drug. (AstraZeneca via AP)

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FILE - This July 24, 2013 file photo shows the AstraZeneca logo on the company's building in Shanghai, China. Pfizer says it does not intend to make a takeover offer for British drugmaker AstraZeneca. The Monday, May 26, 2014 announcement comes a week after AstraZeneca's board rejected a proposed $119 billion buyout offer from Pfizer, the world's second-biggest drugmaker by revenue. (AP Photo/Eugene Hoshiko, File)

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In this May 4, 2014 photo, the Pfizer logo is displayed on the exterior of a former Pfizer factory in the Brooklyn borough of New York. Pfizer says it does not intend to make a takeover offer for British drugmaker AstraZeneca. The Monday, May 26, 2014 announcement comes a week after AstraZeneca's board rejected a proposed $119 billion buyout offer from Pfizer, the world's second-biggest drugmaker by revenue. (AP Photo/Mark Lennihan, File)

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FILE - This Friday May 2, 2014 file photo shows an exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London. The board of AstraZeneca has rejected the improved $119 billion takeover offer from U.S. drugmaker Pfizer, Monday May 19, 2014, a decision that has caused a sharp slide in the U.K. company's share price as investors think it effectively brings an end to the protracted and increasingly bitter takeover saga. (AP Photo/Matt Dunham, File)

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An exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London, Friday, May 2, 2014. The board of pharmaceutical company AstraZeneca on Friday rejected drug maker Pfizer's sweetened takeover offer. Pfizer earlier in the day said it is offering 50 pounds ($84) a share in cash and stock, a 7.3 increase on a previous bid. The offer values AstraZeneca at $106 billion. (AP Photo/Matt Dunham)

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An exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London, Friday, May 2, 2014. The board of pharmaceutical company AstraZeneca on Friday rejected drug maker Pfizer's sweetened takeover offer. Pfizer earlier in the day said it is offering 50 pounds ($84) a share in cash and stock, a 7.3 increase on a previous bid. The offer values AstraZeneca at $106 billion. (AP Photo/Matt Dunham)